QST 1916-11: Vol 1 Iss 12
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HR HICK Arlington Time November wi wl ud 3 = | > uJ 7 | | AG | | | \ LiF : Ly
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Advertious Advertising Value © QST gives you something more than direct returns. The high standard. the guarantee with which we back you up, and the very fact that QST is by the amateur and for the amateur, makes QST advertising the most valuable in the amateur wireless field. Inquire and let-us tell you more about it. ADVERTISING DEPT The QST Publishing Company, Incorporated HARTFORD, CONN Alitzsen . Rotary . Gap . Motor $6.50 1-16 H.P, 2000 to 6000 R PM. 110-220 volts 25 to 60 cycles Shipping weight, 5 pounds OBTAIN THESE WELL-KNOWN MOTORS FROM THE NEAREST DEALER Clapp-Eastham Co., Cambridge. Mass F. B. Chambers Co. Philadelphia, Pa Wireless Equip. Co., Springfield, Radio Dist. Co., Lombard, Il, Buffalo Radio Lab,, Buffalo, I, Klitzen . Wireless Apparatus . Company ¢ 1123 Gerrick Aue. - Racine, Wis. E444 64464 \iways Mention “QS T” When Writing to Advertisers | La - q al | =
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NOV 1916 Ocis369s60 Volume I NOVEMBER, 1916 No. CONTENTS 326 Operation of a Non-Synchronous Rotating Gap A. S. Blatterman 333 Aerials Chas. S. Wolfe 334 More Tough Luck 8ARB 335 Navy Type Audion Detector Bernard Kahn 336 Judge Mayer Holds DeForest Device an Infringement of Dr. Fleming's Invention from N. Y. Times 337 Long Distance with a Spark Coil! E. A. Hartnell 338 Rotten Relaying S. Kruse 340 Rottenest Luck Ever El Amateur 341 Amateur and Government Stations Test 344 Monthly Report of Trunk Line Managers 348 Editorials 351 Who's Who in Wireless 352 Radio Communications 355 Queries Department 358 Wireless Spirit A Nony Mous 359 Pictorial Section 364 Contest Scores 365 Subscription Contest—Prizes 366 For Sale and Exchange Hiram Percy Maxim, President larence D. Tuska, Manager and Editor @ QST is published monthly by The QST aa Subscription price, $1.00 per year. Si matter March 7, 1916, at the Po hing Company, Incorporated at Hartford, Conn. opies, cents. @ Entered as second-c'ass ce at Hartford, Conn., under the act of Congress of March 3, 1879. Copyright, 1916, by the QST Pub- lishing Co., Inc. le registration applied for at the United States Patent Office. THE QST PUBLISHING COMPANY, INC. ° HARTFORD, CONN. MA = I ad 4 ZZ | 3
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FELLOW AMATEURS! Help QST by getting all your friends to sub- scribe and by renew- ing your own sub- scription promptly. THE QST PUBLISHING COMPANY INCORPORATED CIRCULATION DEPT., HARTFORD, CONN. Me | 0 | = 4 2 ete | | i | 4 I, | | i |
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Operation of a Non-Synchronous Rotating Gap By A. S. Radio Laboratory, Washingt RESULTS OF PRELIMINARY INVESTIGATIONS TO DETERMINE CORRECT CONDENSER CAPACITY FOR USE THE EFFECT OF SPARK RATE ON POWER AND TONE OF WIRELESS OUTFITS Reprinted with permission from the Electrical World, September 16, 1916 EVERAL interesting articles have appeared recently* dealing with the rotating gap, and the writer would hesitate to bring up the subject agein if it were not for the fact that in studying the literature on the sub- ject little data is discovered bearing directly on the operating features. This is par- ticularly true of the non-synchronous type of gap as affected by changes in the size of the condenser and in the spark rate. General experience has shown that the cor- rect value of capacity is considerably les for a given transformer when a rotary ‘Theory and Design of Radio Transform- cis,” F. Cutting, Proc. I. R. E., April, 1916. “Design of the Audio Frequency Circuit,” J. Weinberger, Proc. I. R. E., December, 1915, “Resonance in Transformer,” L. B. Tur- ner, Electrician, Aug. 2, 1912. ‘Hytone’ Radio Transmitter,” M. East- ham, Proc. I. R. E., December, 1914. “Resonance Phenomena in Low Frequency Circuit of Radio Transmitter,” H. E. Hall- borg, Proc. I. R. E., June, 1915. Blatterman n University, St. Louis, Mo. WITH ROTARY GAPS AND gap is employed than when a plain station- ary gap is used, and the spark rate effects both the tone and the amount of power utilized. The efficiency is also involved here. In attempting to study the problem analytically, it appears that the relations between both these factors, capacity and spark rate, and the power and high-fre- Spark Gap Transformer Fig. 1—A Common orm and Arrangement of Spark Gap quency currents in the condenser and an- tenna circuits are very complex. An inves- tigation of the subject is now under Way and it is the results of the first set of ex- periments which have been carried out in this connection which form the basis of this article. Where the cycle of primary current is of — = \ DES TEUR 3 a | | |
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low fre advant cal tor spa wave forms A comn pose high equall) periph tionar’ ment circult QST cy, that is, 25 to 133 cycles, the f a.high spark rate with mus:- ve achieved by using for the levice which breaks up the from the inductor or trans- veral sparks per alternation. m of spark gap for this pur- f a metal disk, rotated at vhich carries a number of d studs or spokes about its which revolves between sta- les. The familiar arrange- ind its arrangement in the wn in Fig. 1. Construction of Synchronous Rotating Gap The some speed the 1 to the the tiona mum cure tion disk e differs in its operation and to in its purpose from the so- onous rotating gap. In the k is rotated at a particular that the r.p.s. multiplied into of studs on the disk is equal of alternations per second of alternating wave. The sta- odes are mounted on a frame an be rotated about the disk ner of the brush-rocker on a thus cause stationary and re- dies to come opposite each ing at the instant when the vave is passing through its Thus, one spark is obtained in on of the voltage cycle, and le to take place at the maxi- iitage in the cycle. To se- maintain the synchronous rela- lisk to primary wave the ted on the shaft of the gen- h supplies power to the trans- I ecure the desired high spark gap, transformer and gen- esigned for a primary wave of commonly 240 or 500 cycles, espectively spark rates of 480 er second. The transformer is pproximately) to the condenser produce a condition of resonance equency employed. That is, if L the inductance of the transformer ind C the capacity of the con- farads, then, roughly, adjust- made to make November, 1916 In practice the adjustment is made for a condition of 15 or 20 per cent off reson- ance. Thus, if resonance is obtainable at a speed of 1,500 will Le set at, say 1,300 r.p.m. .p.m. the operating speed Construction of Non-Synchronous Rotating Gap With the non-synchronous rotating gap, on the Other hand, the disk is revolved at high speed, generally without regard to the primary frequency, and instead of obtain- ing one spark per alternation at a constant voltage, the voltage wave is broken up into several sparks occurring at no very clearly defined instants during the alternation, though one particular condition may be that shown in Fig 2, where 1, 2, 3, 4, 5, 6, 7, 8, 9,10 indicate instants of sparking. The condition for sparking is that the instantaneous value of voltage in the wave shall be sufficient to break down the gap between the stationary and moving elec- trodes when these come opposite each other. If, as is entirely possible, a pair of moving electrodes come opposite the side electrodes at an instant in the alternating wave when the voltage is not sufficient to break down the gap or when the voltage is its zero value, then the sparking will be passing through regular sequence of broken, and one, two, three or more studs may pass the stationary side electrodes before the voltage has reached a value suffi- cient to cause a spark. Important factors are the number of studs on the disk, the rotative speed, the length of the spark gap between the moving and stationary studs, the size of the condenser. If the spark gap is made long by draw- ing the side electrodes back from the disk then a considerable voltage will be require! to produce sparking, and thus only a few sparks will be obtained during an alterna- tion. Some of the moving studs will come opposite the stationary studs without sparking, because they do come opposite at instants in the alternating wave when the voltage is too low to bridge the gap. The greater the number of moving studs or the greater the rotative speed of the disk the gieater will be the number of inactive studs during the cycle. made very short, as short as is mechani- cally possible, then a very low voltage is If, however, the gap is 397 = | quen a peed ery a latter ‘ so that after | dy1 volvil other f alternat maxin 3 eat h It a it can | erator forme tone the erato high-feq which eg and 1.0 adiju st) al Tor the repre . ‘ in he : dens¢ ments ars 1 = 2xfC 4
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November, 1916 all that is required to break down the gap, and hence the condition may exist that sparking takes place to every movable stud as each pair in turn is presented to the stationary electrodes. Limitations of Spark Length The maximum possible spark length, to take the case which is shown in Fig. 2, which can be used and still permit sparking to each stud, is that corresponding to the voltage at instants 1, 5, 6, 10, where now the division points 1, 2, 3, 4, ete., must be interpreted as denoting instants when mov- ing and stationary studs come opposite one inother in a position suitable for spark- ing. When the gap length is longer than this every stud will not yield a spark. When it is shorter each stud may still yield a spark. When the gap is set at the critical length every stud will yield a spark only when moving studs are presented to stationary studs at instants which divides the e!terna- tion symmetrically, as shown in Fig. 1. For f the instants of opposite position, which vill hereafter be called the sparking posi- Figs. 2, 3 and 4—Cycles of ‘Transformer Voltage Showing Sparking Positions of Gaps In Fig 2 sparking positions of gap are shown as symmetrically placed in the low frequency cycle. In Fig. 4 a particular case is shown of certain sparking positions occurring at instant of zero voltage in wave, QST 328 tion, of moving and stationary studs are displaced along the cycle as shown in Fig. 3, then at instants 5 and 10 there is avail- able only a_ potential 5-5' (=—10-10') to break down a gap whose length is set for the potential 5-5 (—10-10), see Fig. 2, and hence instead of five sparks per alternation there will be only four. One stud has be- come inactive. If the gap is shortened to allow discharge at voltage 5-5’, then all studs will again yield sparks; and the shorter the gap is made the greater is the permissible displacement of instants 1, 2, 3, i, 5, ete., along the cycle. When the dis- placement is such that the instants 5 and 10 of the representative case coincide with instants of zero voltage in the wave, then, of course, one stud will be inactive. This is shown in Fig 4. If the above reasoning is correct we must conclude that when the spark gap is very short there are two ways in which sparking may occur. 1. In every alternation each stud may yield a spark, in which case the sparks will follow each other at equal intervals. 2. In every alternation each stud but one may yield a spark, in which case sparks will occur in groups, the time interval be- tween groups being twice as great as that etween sparks in a group. If sparking occurs in either the first or second way just described, it may be expected that the length of the gap must be less as the speed of the disk is increased, Series Field AL Fig. 5. Connections for Reducing Speed of Series Motor while at lower speeds it should be possible to use longer spark gaps. Experience has shown that these effects do exist. When the disk is rotated at high speed the spark gap must be made very short to produce any- thing like a smooth tone; and lengthening the gap by as little as 1/100 in. is often found to give the spark tone a very ragged quality, apparently indicating that a num- ber of studs miss spark. On the other i | : & |
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hand, when the disk is rotated at low speed the allov irk gap is found to be much longe Effect of Gap Speed on Power and Aerial Current Gen experience has also shown that the rot peed of the gap as well as the size of tl ndenser has important effects on the p ind the aerial current, and in order t stiwate this the following experin carried out. For the | experiments a small 60-cycle, 5000 forme! was used. The park gay f a common type carrying eighte Che motor was an a.c. series motol i eed could be varied through a range p.m. to 5,000 r.p.m., the lowe eing obtained by adjusting a water re tance placed in shunt with the armature hown in Fig. 5. The higher speeds v tained by giving the brushes a con e lead. Instantaneous values of spe e read from a tachometer. In this wa peed could be kept quite con- tant f ! et of readings. lig. 6. Connections of Apparatus for Gap Experiments AY e glass plate condenser of maximun pacity, 0.01 mf., was used. The high inductance was of copper strip w na flat spiral. The set-up is show! r. 6 An ammeter A, volt- meter | ittmeter W weve placed in the } le of the transformer. In the high-f cireuit was placed a_hot- wire met \ the maximum range f this meter was only 8 amp., it had to be used hunt and calibrated for the wave ised. The calibration was effect ending with reduced power and ‘ eading of the meter without the shur nd then with the shunt connected. The ra the two readings then gave the 1 ne value of the shunt. For observir e length and decrement in the QsT November, 1916 high-frequency circuit the wavemeter induc- tance L_ was loosely coupled with the con- denser circuit, and observations taken by means of the hot-wire milliammeter in the wavemeter circuit in the usual way. 4 1 | +-4 be Bt S90 =-+ +—4 $ ae 3 e+ Condenser Capacrtiy= 0 | ik rover $000 mansfor mer Voltage | + + 4 gt - 3 Spark Frequency Fig. 7. High-Frequency Current in Con- denser Circuit and Watts in Primary of Transformer as Functions of Spark Frequency A preliminary set of readings (Table 1) were obtained with the speed as independent variable. Current in the condenser circuit and power in watts in the primary of the trans- former were plotted against spark fre- quency, as in Fig. 7. It was found that with the higher spark rates the condenser current and power increased at a slower and slower rate toward what appeared to be a maximum. This was interesting, and steps were at once taken to ascertain if the curves did pass through a maximum and then fall as the motor speed was carried to very high values. The 5,000-volt transformer was replaced by one wound for 13,000 volts, and a new spark gap installed having twelve points, whose speed could be accurately controlled from 200 r.p.m. to 12,000 r.p.m. The effect of disk speed was examined first. The motor speed was varied for dif- ferent values of the capacity in the con- denser and readings taken of speed, high- frequency current, watts input to the trans- former, primary voltage and primary cur- rent. Table 2 and curves of Figs. 8, 9 and 10 show results with condenser capacities 2) 329 | L™ aa |. “<A |
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November, 1916 of 0.005 mf., 0.01 mf. and 0.02 mf. respect- ively. All three of these curves exhibit distinct maxima of current in the high-frequency > & $ E a 700 4000 «600s 000 400 an Spar k Frequency Figs. 8, 9 and iv. Current in the Spark Circuit as a Function of Spark Fre- quency with Different Condenser Capacities Table 1 quency QST 330 the effective length of the spark with change in speed, this being greater at the low speeds. It is also probably due in part to a quenching effect at high speeds. This method of determining the resistance of a spark circuit by the usual methods of meas- uring decrement and substitution in the above formula cannot be applied when the spark is quenched or when its resistance is comparable with the resistance of the rest of the circuit. Under this condition the damping is linear and not logarithmic.* The important thing to know, however, is that as the spark frequency is continuously decreased from a high value, the high-fre- quency current at first increases, reaches a maximum, and then decreases. This result had been anticipated, and in the theory pro- posed to account for it, it seemed that similar effect might be produced by chang- Effect of Variations of Spark Frequency on Primary Watts and High Fre- Current Motor Speed, Spark Freq. r.p.m. N 1500 450 1800 540 2600 780 3400 1020 3800 1140 5000 1500 Primary H. F. Current, Watts Amps. 345 11.2 400 12.2 510 13.4 590 14.9 610 15.2 630 15.9 circuit corresponding to certain critical motor speeds. The power in the condenser circuit, which if this circuit were coupled to an aerial, would, of course, determine the aerial cur- rent, is P=1°2R, watts, R being the high-frequency resistance of the circuit and equal to 1 C i=wave length in meters where C=capacity in microfarads decrement (semi- 5— logarithmic period). Decrement determinations made at dif- ferent speeds showed some variation in the high-frequency resistance of the spark cir- cuit. This is probably due to a change in ing the size of the condenser. Accordingly, a set of readings were taken at different speeds, the speed being held constant and the condenser varied in steps from 0.005 mf. to 0.02 mf. The results are given in Table 3. The curves of Fig. 11 drawn from this data show that for any given speed the current in the condenser circuit is maximum for a certain value of capacity and any change from this critical capacity is accompanied by a decrease in current. The curves of high-frequency current in the above figures may be taken to indicate in a comparative way the variation of power in the condenser circuit. The power is, of course, proportional to the current squared, provided the resistance of the cir- *J. Stone Stone, “The Electrician,” Sept. 18, 1914, Proc. I. R. E., December, 1914. ! — é = & s si d Bee ; >
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331 QST November, 1916 Table I1—Effects of Variations of Condenser Capacity and Gap Speed on Primary Watts and High Frequency Current Capacity of Motor Speed Prim., Prim., Condenser in mf. r.p.m. AMPS. Watts Amps. Volts VU. 12,000 3.6 115 5.1 108 6,900 4 140 5.2 108 4,000 1.9 150 5.2 108 2,000 4.9 73 5.3 108 1,000 1.46 I85 5.4 108 0.01 12,000 4.0 110 5.3 108 5,400 5.0 125 5.3 108 3,500 5.0 130 5.2 108 2,000 5.4 140 5.3 108 1,220 5.5 150 5.4 108 1,000 5.6 165 5.6 108 500 5.0 175 5.8 108 0.020 12,000 3.0 96 5.3 108 6,400 4.0 115 5.4 108 4,000 4.0 115 5.4 108 2,000 4.5 124 5.4 108 1,000 4.5 135 5.5 108 cuit does not change, but in a qualitative procedure kept the radiated wave length the way, the plot of current also shows the same and thus avoided the possibility of changes i: wer. In this connection, Table changing aerial resistance with changing 2 shows that the efficiency as determined wave lengths. by the rat tput to input, reaches a maxi- It would appear, offhand, that with a mum for a certain spark frequency. This’ given transformer potential, an increase in Table Ill—Results with Constant Gap Speed and Variable Condenser Capacity *mperes in Condenser Circuit C in mf. N=360 N—1000 N = 1800 N = 2400 0.0 4.9 4.8 4.1 3.6 { ‘ 5.3 5.0 4.3 0.01 5.5 5.0 1.4 4.0 0.02 4.25 4.0 3.4 3.0 is evident because the primary watts con- tinue to increase after the current in the condenser iit begins to fall off. Results similar to the above have been obtained with an actual transmitter, the readings of the aerial ammeter being kept under observation while the spark fre- quency and condenser were varied, care the latter case to keep the compensating This being taken ir wave changes in constant by closed circuit inductance. lengtt either spark frequency or in the size of the condenser would be accompanied by an in- crease in power, in accordance with the for- mula, “%CV2N. The increase in power with decrease in spark frequency observed frequency and condenser, therefore, leads to the hypothethis that the average value of V is affected by these factors, and entering as the square in the determination of power, overbalances opposing changes in either C or N., } i 1
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November, 1916 Consider, first, the case in which capacity is changed and N remains fixed. When the condenser is reduced the potential to which Amperes in Condenser Circurt Capacity of Condenser in Mfds it is charged in a given short interval of time is greater than when a larger con- denser is used. The condenser charges in the time interval between successive spark- ing positions of the disk electrodes, and hence, if in this interval the potential is in- creased, even though it be at the expense of decreased capacity, the energy per spark may be increased because this varies with the square of the spark voltage and only according to the first power of capacity. Limit to Changes in Condenser Capacity There is evidently a limit to which this automatic adjustment of spark voltage through changes in condenser capacity can be carried. There soon comes a point be- yond which the potential, for a given trans- former winding, cannot be further increased, and hence at this point it is disadvantageous to use smaller condensers. We are not dealing here with the re- sonance effects producable through the proper balancing of capacity against the inductance of the transformer, although the’ curves of Figs. 8, 9, 10, 11 do undoubtedly show that for the particular transformer used in these tests a capacity in the neighborhood of 0.01 mf. is best, and it may be that a condenser of this value is that required for resonance. The effects described, however, are believed to be due to the inherent regulation of spark potential in the manner described. In fact, the build- QST 332 ing up of potential through resonance in the usual way does not take place when discharges occur, as they do here, several times in each alternation. An explanation similar to the above also explains the results obtained by varying the spark frequency, either by changing the speed of the disk or the number of studs thereon. It was found, starting with a very high spark frequency, that decreasing the motor speed while the condenser re- mained unchanged, caused at first an in- crease in oscillatory power which continued up to a maximum value corresponding to a certain critical motor speed, beyond which (i. e., lower speed) the power fell off. As in the previous case of variable capacity and constant speed, it is believed that the effect is due to the fact that down to a certain speed corresponding to a certain spark frequency the condenser potential reaches a higher value due to the longer interval of charging between studs so that even though the spark frequency is de- creased the average value of the squared voltages increases at a more rapid rate and hence more power is utilized. This theory is roughly checked by the fact that when a non-synchronous gap is rotated at low speed and with small con- densers the spark does not spring radially from the moving electrodes, but anticipates the exact diametrical position of moving and stationary studs and leads to the ad- vancing electrodes as they approach suc- cessively into sparking position. At high speeds and with large condensers this ef- fect is not nearly so pronounced. It is also important to note that these experiments show that as the speed de- creases the condenser required for maxi- mum high-frequency current increases, and bear out the statement made in the opening paragraph of this paper that smaller con- densers must be used with rotary gaps than with stationary ones. In regard to the readings of the hot- wire ammeter in the condenser circuit it must be understood that these are the sum- mation effects of a high and a low-frequency current, the former being that of the oscil- latory condenser discharge while the latter is the current sent through the condenser at line frequency by the transformer. This Continued on Page 354 = > + > + + + + > + 4 | +—+—_+— + ~ ia } | | | 4
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T November, 1916 as outdone his article on “Liars” in the October OST, by coming lerials’ is the leader for humor and is so true | large we antennas which might be taken for the hero of this article HE ae il is a trap, a snare, cun- ispended in space by the experimenter for the pur- way-laying migrating 1ins as said trains pass passing kites with merely incidental. Were erial, foolish wave trains ay-iays their substance in riotous aving. We ebted to Marconi, whose last n ronounce and whose first me t, for this ingenious method to ourselves those which ays possess a damping de- eeding two tenths. There ion in amateur circles as Marconi should be thanked or aking, aerials are divided asses; amateur and com- mercial aerials are used to om growing lonely. Amateur ily efficient at lofty tumb- get greater results than single collapse, depending ation and lack of tensile wires, but on the’ whole, aerial will do more actual n foot of falling matter than ch uses the air as a medium of er gazing in admiration at the a certain amateur over- fell swoop it shoved twenty through a plate glass dis- hed the other twenty feet rittle dome of a hot house a pped a strand of copper across wires, thereby sending in four nd summoning three patrol DITOR wagons; then wound the remaining strand gracefully around the neck of a passing policeman. The lead-ins, after a_ barely perceptible instant of hesitation, attached themselves lovingly to a friendly barrel wagon, which was, at the time, en route. All this, mind you, in one simple, easy movement. Darned fine falling, I call it. No man knoweth what an aerial will next do. They are eccentric, and-er-capricious. I have a distinct recollection of an evening in February. Six or seven of us were assem- bled in my station, industriously using up the contents of a four volt forty and speeding a much abused filament towards a premature demise. On this placid gath- ering burst one of my usually peaceful neighbors. There was fire in his eye, and his nostrils belched forth smoke. He shook a brawny fist in our direction and announce- ed in exceedingly harsh tones that he could lick anyone of the assembled multitude, regardless of height, weight, race, color, or previous condition of servitude. When no one took advantage of this very generous offer, in a burst of magnanimity he made it any two, three, or four, collectively, or individually, the choice resting entirely with us. Some one politely remarked that ours was a radio station; that the gentleman had evi- dently became confused and lost his bear- ings, the prize-fighting factory being sev- eral blocks down, and to the left. I calmed the irate one with some diffi- culty, and allowed him to tell the following tale: One of my aerial strands had elect- ed to break, just as a gentle zephyr of north-east persuasion was passing. My wire joined forces with the depraved zephyr, and landed athwart my neighbor's tele- e eriais | i | i would , pe into ft rr a aq flight | men hea throug} fre.
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November, 1916 Qs It seems that as I transmitted, a few wave trains of high frequency, on adventure bent, had, out of curiosity no doubt, wandered along the telephone line and into my neighbor’s instrument. The unfortunate part of the whole affair was the fact that the receiver happened to be in our visitor’s hand at the time. Hence, the threatened breach of diplornatic rela- tions. The aerial is the first thing the prospec- tive amateur considers. The aerial is also the last thing the disgusted veteran con- siders, when about to dismantle. Incident- ally, one continues to consider it through- Consideration of the Even as phone line. out his entire career. aerial enriches the vocabulary. Minerva sprang full-grown from the fore- head of Jove, so do many new, picturesque, and very expressive cuss-words spring spontaneously from the lips of the hapless bug as he considers the wreck of a fallen aerial. The last thing the enthusiast con- siders at night is his aerial, wondering if it will last the night and knowing blame well it won’t. The first thing the same en- thusiast considers in the morning is his aerial, wondering if it’s still up, and know- ing blame well it isn’t. He considers the aerial in the heat of T 334 summer, when the joyous lightning is play- ing tag with his No. 12 B. & S. He con- siders the aerial in winter, when sleet and ice cluster on spreader and strand; in fact, he considers it at all times and on all oc- casions. About the very first lesson that the no- vice learns in the wireless game is the sad fact that aerials do not grow on roofs, but are, alas, placed there by the sweat of one’s brow and at the risk of one’s neck. After about six months on the inside, the owne1 of an aerial finds a great feeling of com- radery growing within him for tinners, and those who pass the greater part of their lives on roofs. In fact, when passing a group of dusky hod carriers, he never fails to say, “How are you, fellows?” Patiently, he stands on his scorching tin roof and mends lead-ins when a difference of one degree Fahrenheit is all that de- termines whether he is alive, human, or Experimenter a la Friccase. Patiently, he that rodf in rapport with Cook, Peary, Shakleton, et ai, stands on same winter, en and mends those self-same lead-ins. Won’t some kind scientist please find a way to get Calcutta without an aerial? Think of it, friends! Aerial-less wireless! More Tough Luck By 8ARB AVE listened to a long distance station and just as he was about to sign off his call letters, children with would you ever a gang of outside these coaster wagons (noiseless) rumble by and make all the racket imagin- able, or some factory or locomotive whistle would blow to its fullest blast, and you would no longer hear the station sending? At least, you would not try to hear him, for you would throw down your pencil and take off the phones; then think how you could stop the noise. This is the experience I have occasionally and I suppose many others have the same. But to fellows living on a street car line as myself, is still worse. The other night while copying a long distant amateur, a street car passed the house just as he was signing off his call. But this did not hap- pen once, but the second time. After he had sent gain and was about to sign the second time, another passed, and a mighty noisy one at that. Just my luck. I was unable to get his call and was mad enough to shoot (or otherwise punish) the motor- man for causing all the disturbance. car No wonder I never hear many long dis- tance stations. Am able to hear them al- right, but it is just my luck to be bothered by some noise or other as I am about to copy the call letters. What about it fellows? same tough Have you experienced the luck? | - | 4 y a ¥ H 4, ‘ 4 f
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QSsT November, 1916 J Navy Type Audion Detector By Bernard Kahn HI accompanying photographs the latest type of audion h was developed by Dr. Lee Forest. It is being used ex- ively by the United States Navy iid to be the most sensitive The construc- of all ting audions. The Navy Type Audion tiona of the detector are somewhat differs in the ordinary type. This new bul a spiral filament. The grid whicl ngular consists of a fine nick- el wi on a special glass frame. The mprises a double nickel plate sup} rlass stilts on both sides of the g may be seen in the photograph. On ( mportant feature of this tube is th ming of loose conductors which lead grid and wing of the older type. A special cap is placed on each tube which is fitted with terminals as indicated, two of which connect to the grid and wing electrodes, while the third is linked with one leg of the filament and the other end of the filament is connected to the case. A brass shell, shown in the illustration is secured to the insulated cap of the tube. Contacts are fastened on the interior of the shell so that the proper connections are made when it is put together. Two con- ductors from the shell connect with the grid and wing electrodes while the screw base is connected to the filament in the usual man- ner. The whole arrangement fits into a standard size socket. One _ illustration shows the audion completely assembled and ready for use. The audion in this make-up is extremely sensitive and may be used for spark or are | | Navy Audion with brass shell removed signals. The filament has an average life of 5,000 hours, which is ten times as long as the existing ones, j | (4 ’ > 5
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November, 1916 Judge Mayer Holds DeForest Device is an Infringement of Dr. Fleming’s Invention QST 336 Basic System Purchased by Marconi Com- pany Has Never Been Improved Upon, Court Holds From New York Times contention of Marconi HE the Wireless Telegraph Company of America that the DeForest Radio Telephone and Telegraph Com- pany had infringed its rights to the sole use and ownership of the patent covering the Fleming detector was sus- tained in an opinion written by Judge Julius M. Mayer of the Federal District Court. Dr. John Ambrose Fleming, an educator, invented the detector in 1905, and almost immediately thereafter the Marconi the rights to its English Company ootained use. While the more years old, it has never been improved upon by any other discovery making more resonant the through the air. It was preceded by many other con- trivances, variously known as the coherer, a glass tube filled with filings; invention is than ten for messages sent which the Cry and the was tal detector, electrolytic detector that was in- the magnetic detector, vented by Professor Fessenden. William B. Vansize of counsel for the Company that the DeForest Company said that the DeForest Company had been using a device set within the globe Marconi said of a lamp, but that the idea was taken from the invention of Dr. Fleming, and was clearly an infringement of the patent owned by the Marconi Company. In his decision Judge Mayer said that no differences of opinion might matter what exist between men of science in respect to the theories by which they accounted for the movement action of the forces concerning which testimony had been taken during the trial of the cause the solu- the was not very and unseen tion of issues at bar difficult, because courts placed their deci- sions upon things demonstrable and coul¢ speculate as to theories concerning which authorities did not agree. Then the decision read: “Within the limits of an opinion it is, of course, impossible to analyze at length a mass of experiments, tests and theses, and an infinity of detail necessarily involved in testimony of experts in an art of this kind. But if the plaintiff’s theory that its own device and that of defendants oper- ate on the same principle has not been proved, and I think it has as far as such proof is possible — at least defendant’s theory has not been demonstrated and, finally, the physical facts all support plain- tiff’s claims.” Judge Mayer complimented Mr. DeFor- on the contributions he had made to science. Then the court found for the plain- tiff, dismissed the counter-claims made by the defendant, but said that there was no evidence against Mr. DeForest personally. Dr. Lee DeForest, President of the De- Forest Radio Telephone and Telegraph Com- pany, said that an appeal would be taken from Judge Mayer’s decision by his com- pany. He added that while the Marconi Company also was found to have infringed he believed they would not appeal, since the royalties they might be able to exact from the DeForest concern for infringement of the Fleming valve patent would be far in excess of the amount they would be called upon to pay for infringing the audion ampli- fier. The latter, he said, was widely used, particularly by the American Telephone and Telegraph Company on its transcontinental lines and by amateur wireless operators all over the country, while the United States Government had bought more than 10,000 est 4 q ai < ill
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337 of them explained amplifie tric bull ing pract gether Fleming fter Spark ( of QST, | cerning which accomp have beer night, ex I use a twelve input of The co ped wit! denser ha consider‘ a found a QsT November, 1916 nfringement decision, he the fact that the audion of an incandescent elec- was employed in tak- tage of a principle alto- ym that upon which the based, though the latter was the first device embracing the use of a lamp to be patented. Dr. DeForest thought the Marconi Company would not attempt to force discontinuation of the audion de- vice, as he said, it had proved a far more satisfactory amplifier than the Fleming valve. Long Distance with a Spark Coil By E. A. Hartnell, 9KY e, “Long Distance with a peared in a recent issue numerous inquiries con- and the conditions under es may be covered. The sary for long distance work. This con- denser was made by coating twenty-four nine by fourteen inch glass plates on both sides with heavy tinfoil. These plates were connected in series multiple and immersed MR. HARTNELL’S STATION lata describes my set. I to cover 75 miles, day or iring cases of extreme QRM. inch spark coil, run on a rage battery with a power twenty-four watts. of Bunnell make, but equip- gh-speed vibrator. The con- apacity of .01 m. f.d. This is rge for a spark coil, but I capacity absolutely neces- in insulating oil. An ordinary fixed spark gap is used. I have one of the well-known lkw. brass ribbon oscillation transformers with which one may obtain a very sharp wave. The transmitting aerial is of the “T” type consisting of two wires, 130 feet long and 40 feet high. I have a regenerative audion receiving set and no difficulty is experienced in pick- ing undamped wave stations at a distance Continued on Page 339 al | | larce
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November, 1916 QsT 338 Rotten Relaying By The Old Man’s Understudy—S. Kruse AST winter we got the first con- siderable number of relay msgs thru this town. It was then we became acquainted with the relay jinx. For some reason the same fellows that are ordinarily perfect gentlemen and good operators will suddenly and unanimously lose their minds when a relay comes along and commit radio crimes that make you long to drown them in their condenser tanks or brain them with their own spark coils — supposing that they have brains, which seems unlikely. One evening last December I was called by a fellow down in the west end of the state who had a message for New York with a request for an immediate reply. I was working an Illinois station at the time and asked this station to QRX while I got the msg. Mr. Illinois O Kd and I asked the westerner to GA. At this point the radio jinx grunted un- easily and rolled over but didn’t awake fully—he merely started a fellow in Ohio on the exact tone and wave of my western- er. Still I got most of the msg tho I chewed an inch off the top of my pencil and revised and edited till the thing looked as if it had come thru a British censor’s office. Then I called my westerner and said “Here repeat” and shot it back at him. Possibly he answered; I don’t know. A 3-4 K. W. Thordarson in the next block started just then and called 8NH six or eight times. I waited patiently till he was done and then asked him to QRX till I got my msg, unless he had some special business with 8NH. He was still, after that, so I guessed he was going to stand bi. Well he did, but when I called my westerner again he was as silent as an audion on visitor’s day. I called twice more and then told my neigh- ber to ga with 8NH as our sunset friend had shot something. Did he ga? He did not. He had quit in disgust. I felt rather bad about it and called him on the fone to tell him how matters stood. He said that he would call again right away. I don’t need to tell you what I heard when I got the receivers back on, do I? It was my westerner and he was in the middle of his msg. I got about three words thru the 3-4 Thordarson and then he flipped off with “Please repeat back agn”. I hard- ly had the heart but still called the neigh- bor and asked him to QRX again and help me get the msg. Then the jinx choked on a joke that he had dreamed of and woke up coughing. He was mad and took it out on the nearest ham. That was me. My neighbor retorted with great prompt- ness and vast heat that he was crash blank- ed if he would lose 8NH again. I retorted with a classic abbreviation of three letters advising change in surround- ings. Then I flipped off the audion, and went after a drink of water. When I got back the 3-4 was in the midst of a seven chapter account of something that did not interest me. I stood bi till considerably after twelve, hoping that the conversation would cease after a time, but as it did not, I got down Zennek and read the chapter on decrement for the fifth time with the usual result that I got stuck on the determination of the instrument decre- ment. I was still fighting that when it dawned on me that friend neighbor was not talking to 8NH at all any more, but was swapping yarns with a fellow in the next town about 20 miles away. I cut into that conversation and asked them to have a short smoke—or while I got that msg I had waited an hour for. To my surprise they did it. I got my westerner and repeated back only to dis- cover that I had gotten the thing right to the letter an hour ago. The jinx shuffled back into his hole cackling and snorting. I called my Illinois man and shot him the msg and asked for an ok or repeat as he pleased. He spoke right up and sent me a good clear cut string of Continental— concerning the ships he had been hearing. * = 7s 4 4 ou = q > 3
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QST words to do it while I sweat ewed the pencil into an evil ned six or nine times and ind in my very crispest bt msg? Pse report.” lic noise as of a Katy-did began somewhere near board where the little are and gradually jerked it got stuck on the last abruptly expired with a g angry and said “D—— that called VBK giving him a Then I called Illinois and eat account of QRM. He tarted to tell me about a \fter ten minutes of that he to the msg, saying that ind would get it off later. Here O M! It’s twelve thirty t msg is addressed to New ish to 8NH or 8AEZ right [ thot the jinx had retired 1 relieved sigh. But it got idle, for I noticed right off tandbys in Ohio had quit started again just then and what Illinois did next but truck one I heard him giv- fellow up in eastern Michi- it and he had that msg ts author would have disown- hesitation. I called again and finally about one chigan man got it straight. ng to cut off for the night that Michigander call a sia- Dakota and start to give him The Dakotan copied the msg. Say boob! Why don’t you man was right there. He ip a map and find your- that Dakota is east of two o’clock when the thing ned over to 8BC or some- region and I knew that it back from New York that irned in November, 1916 I woke up with the fone bell still going and dragged the thing over to where I could muffle it with a pillow. Then I got the receiver down and said “Hello.” A familiar voice said—“Say that Illinois nut is calling his head off. I told him I'd get you. Good night.” Darn it! I was half asleep when “the Illinois nut” answered and didn’t get his drift at once. Suddenly I was wide awake. HE WANTED TO KNOW WHETHER THE DATE ON THE MESSAGE WAS DECEMBER OR OCTOBER. I called him a jackass. This was not polite. It was not even reasonable, be- cause the idea was original with the fellow up in Michigan. Nevertheless the more I thought about it, the more I decided that he was that animal, and I even went into detail as to his mentality and ancestry. I made scathing reference to the reputa- tion for original and unique foolishness that he owned and operated, and asked if he had to be carried in when it rained. Also I told him that if he went out in the daytime he had better tie a string to him- self so that it would hang out of the hole and mark the place where the squirrel had hidden him. I'll say this for him. He was good natur- ed. He said “HaHaHa” and said he would pass the glad news on to the Michigander. He was at it when I went to bed—after tying the fone bell. I don’t know if that message got to New York. As far as I am concerned it can go to Sheol. Long Distance with a Spark Coil Continued from page 337 of 5,000 miles. NAA time signals may be copied 300 feet from the phones in the even- ing and about 100 feet away in the morn- ing. Atlantic Coast stations and gulf boats may often be heard 15 feet from the phones. Cuban and Mexican spark stations are of- ten copied in the evening and last but not least, the long distance amateur stations. Amateurs operating on a 200 meter wave have been heard 1,000 miles under fav- orable conditions. Probably the loudest long distance signals come from 8AEZ and blood ana brown pulp Finally e sis I cut in tones sal Hv Then a 31 with th: ( the top “tink-tink’ rt down the é bass note d choked grunt I was gett electrolytic” “99 min asked for a said O K a camping casually ref he got it O I said “S« now and tl York. Pleass now!!” Well it took! f stuck in the m for the nit« The Katyd I don’t kno after the cl ing it to sor gan. I coy balled up til ed it witho and correcté twenty the |] I was just 4 tion in N tl ‘ “msg fr u.” and ther il send that ist The Michiga said—‘‘Sa i self. Dor ) Michigar Can yi Well it is was fina t one up Il tna would never ¢ nite so | t =m. al
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November, 1916 8NH who actually cause interference at times when receiving from a half Kw. sta- tion twenty miles away. The receiving set, as seen in the illus- tration, comprises large and small coup- lers, variometer, four variables, oscillating coil, 200 ohm Brandes’ phones and Elec- tron-Audio bulb. Old discarded dry cells supply the high voltage for the audion. The receiving antenna is composed of two wires, 400 feet long and 80 feet high. Both aerials are supported by a wooden pole, 80 feet high, built from two lengths 20 feet long, 6”x6” and two lengths, 20 feet long, 4”x4”, bolted together and supported by No. 12 guy wire. The ground connection is made by drop- ping 140 feet of half inch copper ribbon Rottenest By El ALK alout your rotten luck, but I think the following story has them all “skinned a mile.” “){”", a promising young amateur of limited means, in a certain city, was always on the watch for ways to improve his station. Seeing a picture of one of the U. S. Army Field with the mast, he decided to make a mast somewhat like that he saw using ten pieces of bamboo ten feet long. Everything went well until the pole got up about seventy-five feet, when one of the top guy wires came loose from its fasten- ing and down came the pole. Nothing undaunted, he cut out the broken parts and started the pole up again. When it was eighty feet up he decided that would do. He began to make fast the guy wires when the pole buckled and fell. Being still determined to have a tall pole, he secured six sections of good solid pine, twenty feet long, and ranging from 5”x5” to 3”x3”. This he formed into a pole and erected, guying it securely (or so _ he thought). He then raised his aerial and to com- plete the decorations he raised a 3’x5’ flag. All went well for exactly six days when sets QST 340 Luck Ever Amateur into a well. Connection is also made to the pump pipe which extends down in the water, 140 feet. Amateurs trying to cover long distances with a spark coil should not be discouraged if their first attempts are un- successful, for of course the set must be tuned extremely sharp, all connections soldered and carefully insulated. I believe amateurs who now cover short distances should build more substantial condensers, look after their ground connection, insula- tion, etc. Then longer distances could be covered. 9MA of this town has also been obtaining equally good results from a two inch coil. Last winter 8AEZ reported hav- ing heard his signals on several occasions. This distance is about 200 miles. Dame Nature exerted herself mightily, breaking off the top forty feet of the pole which in falling broke four telephone wires and stretched two others. Even then he was not discouraged but put the pole back up using larger guy wire. He pulled his aerial up and tried it out twice, when six days after erection Dame Nature once again exerted her strength taking off the top twenty feet, which in falling tore through the roof of “M”s wire- less room. All this covers a period of about four months and “M” says he is so disgusted that he is just about ready to sell out and quit the business. If anyone can tell why a 110 foot pole guyed strongly with No. 12 galvanized iron wire to “dead men” forty feet from the base of the pole should fall, please write it out and send it to QST for “M” would like to correct his faults. Say fellow “Hams”, doesn’t this beat ’em all? If any of you have ever heard of any worse luck than this I think we should all greatly enjoy reading it. By the way, “M” asks should he try it again or throw it away, which? alll “> + + ed j
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341 QsT November, 1916 Amateur and Government Stations Test HE NAA test has been changed. from NAA. The mere repetition of the Originally, it was proposed to relaying would help distribute the news. e NAA at Arlington send out a certain message and have the amateurs of the country copy and ocal Federal officer, such as The latter send ton where they could be listed of towns and cities through- deliver it the Postn them to Ar and the r was to out the which could be reached immediate \rlington ascertained. Comm D. W. Todd, Director of Naval Communications at Washington, was the authority in the matter, and he sug- gested t would be better to have the tests cor ted by the different Naval Ra- dio Districts, rather than by NAA. To use his own w “The District Communica- tion Superintendents at the U. S. Naval Stations, Boston, Washington, Charleston, Key West, New Orleans, Puget Sound, San Francis« nd San Diego are responsible for the organization of amateur stations in their Dist , and should any tests be- tween the Relay L« tions of the American Radio and the district center sta- tions of tl rious districts be desired by you, it w mprove the co-operaticn be- tween rad itions in the various districts and the District Communication Superin- tendent The spirit prompting your sug- gestion is appreciated, as it is to such co- operation that the present organization of amateur stations by districts is due.” This distinctly better than using NAA because, among other things, sta- tlons on ti Pacific Coast would be out of ed with stations in the eastern vuntry. If the tests are con- different District Head- it as part of tl ducted fron the quarters, on the other hand, pretty nearly all parts of the country have an equal chance. The only parts which will have to tune y and listen carefully will be those down through the middle, equi-distant from each ist. Another thing:—In actual stress, it v d be easier for NAA to notify New Orl and the latter hand it on to San Dieg ind the latter to Puget Sound, than to attempt to cover the entire country Commander Todd was hearty enough in his cooperation with us to immediately no- tify the District Communication Superin- tendents at the various U. S. Naval Stations mentioned. Each one of them took the matter up with a view to doing the best they could in the way of a test, as is shown by letters received from each of them. In fact, one station went at the matter im- mediately, and ran the test in his District on the night of October the 7th. This was earlier than we expected. In the case of this District, however, every amateur with a Government license in the District was notified by mail of what was to be done, so that even if nothing was printed in QST, the information went out. The different Districts tests are sum- marized in that all amateurs may know what is being done in all Districts. Doubtless many amateurs will lap over from one District into another even if they do not hear three Districts in some cases. Here at Headquarters, we certainly would expect to hear Boston, Washington and Charles- ton anyway, and possibly Key West also. order Summary: Boston.—“I desire to inform you that I am greatly interested in any tests you may desire to make between the Radio Relay League and the Beston District Center Sta- tion and assure you of my hearty co-opera- tion. I believe it will be necessary to hold a personal conference and will be pleased to make an appointment with you or your representatives in Boston, at such time as may be most convenient to you.” We intend to call on Lieut. Blakeslee, the officer in charge, as soon as possible, and arrange for the tests. His District includes the States of Maine, New Hampshire, Vermont, Mas- sachusetts, Rhode Island, and Connecticut. The Boston Communication District proper, includes the Naval Radio Stations at Port- land, Me., Portsmouth, N. H., Boston, Mass., Cape Cod, Mass., and Newport, R. I. In
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November, 1916 Q organizing communication between ama- teurs in New England, it is the Govern- ment’s desire to make use of all of these stations. Charleston, S. C.—‘The Charleston Radio Station will be very glad to co-operate with you in regard to the tests mentioned. The following procedure will obtain if satisfac- tory to you. Charleston will send on 600 meter wave length at 11:15 a. m. on the date decided. We will send out a QST (gen- eral call) followed by the word amateur, spelled out three times, and then the mes- sage of about thirty words. The speed of transmission will be at the rate of ten words per minute. Use 75th Meridian time. The following alternative times are sug- gested in case the time mentioned above (11:15 a. m.) is not convenient: 6:15 p. m., 7:15 p. m., 8:15 p. m. The Charleston Dis- trict embraces the States of North Caro- lina, South Carolina, Georgia, and Tennes- see.” The time, 11:15 a. m. would be very inconvenient for most of us amateurs, and we have selected the alternative offered us of 8:15 p. m. and the date of November 16th 1916. Three tests will be conducted. known as Test A, Test B, and Test C. Test A is sent after giving notice of date and hour of test, for instance, 8:15 on the night of Nov. 16th. Test B is sent out after giv- ing twenty-four hours notice in advance by radio of the date and hour of the test message. Test C is sent out without giving any notice of the date and hour. The no- tice to be given in Test B will be given during the transmission on the night of Nov. 16th. Every amateur receiving the message is expected to write it on a postal card, sign and date it and mail it to the District Communication Superintendent, U. S. Navy Yard, Charleston, S. C. A witness must sign the post card to assure that the message was actually received by Radio from the Naval Radio Station at Charles- ton by the person signing the post card. This is to avoid “cribbing.” All amateurs in this District should make every effort to make a good showing for their States. Washington. —- Lieut. McCandish decid- ed that the only test he would care to make in his District, was to ask the ama- teur stations in his District to copy NAA press on the nights of Sept. 28th and 29th. T 342 This District covers the Washington Naval District, and seems to be the best the ama- teurs in this locality can secure in the way of a test at this time. San Diego, Cal. — This station through its District Communication Superintendent, Lieut. J. M. Ashley, sent out the follow- ing printed notice: “To All Amateurs :— 1. In accordance with arrangements made with the Relay League of America, and to determine the results obtainable with amateur stations, the following tests will be carried out from the Point Loma Navy radio station (NPL): 2. On Saturday October 7th at noon (im- mediately or within an hour after the time signal) the above named station will send a message. The call will be “Amateurs, amateurs, amateurs—(text)—(sig) NPL.” 3. Two messages will be transmitted, the first of 750 meters and five minutes later the second, on 1900 meters. “Time” is always sent out on 2400, which may help you on your tuning adjustment. Each message will be transmitted twice at about 20 words per minute. 4. Immediately upon receipt of these messages, you are requested to mail your copy to the District Communication Super- intendent, addressed envelope enclosed, no postage necessary. 5. Within one week after the transmis- sion of the above messages, another mes- sage will be sent from NPL. The date of this message is withheld, but will be sent between 9 and 10 p. m. on 1200 meters. You are requested to use the other envelope for returning copy of this message, as per instructions in paragraph 4. In both tests, please send in your copies even if you do not get the entire message. 6. Your copy shall be signed by your- self and one witness that it was received only by radio. Also immediate mailing is requested as one of the results hoped for is to determine the time required for replies to reach this office. 7. You are urged not to co-operate with other amateurs in comparing or correcting your copies, because, as is plainly evi- dent, this would destroy the value of the results. 8. Requesting your hearty co-operation and with best wishes for results of this | | | | ol f 4 or q
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343 test and This been put Novem! the result will prir progress of Radio, I am Very respectfully J. M. ASHLEY, nant (j. g.) U. S. Navy, Communication Superintendent.” “a” of course now over, having vuugh between the October and ies of QST. We shall have the test in due course, and in these columns. It will be for the rest of us to see very inte how the ws in Southern California made « NPL. Key Ws “Have delayed in answering your Sept. 16th, with the hope that would be so arranged that we cou out a test with amateur statior Florida, something we had planned some time ago. Today we received ctions to start a test with all arc stat test to continue indefinitely. As you wv inderstand, this kind of work brings 1 believe we sponde: amateu! such forty amateur circular to har would be present as our I pleted ve and will lined cludes Mr. Stot the test number country farther Puget followir amateurs th State of correspondence. I do not should be attempted unless position to attend all corre- answer all inquiries from are sure to result from [ have on file the names of s in this state and to prepare s and mail to each, and next, the resultant correspondence than we could handle at the me It is probable that as soon listant control station is com- in much better shape glad to arrange a test as out- letter.” This District in- of Florida. As soon as an arrange things, he will run ind let us know the results. The imateurs in that part of the much less than in other parts and west. a} n will be north Sound.—This station sent out the reular letter to all registered n the Puget Sound District: T November, 1916 DCS—580 EJB—HOE OFFICE OF DISTRICT COMMUNICATION SUPT. PUGET SOUND DISTRICT Navy Yard, Puget Sound, Wash. Bremerton, Wash., October 7, 1916. Circular letter to all Amateur Radio Op- erators in Puget Sound District. Dear Sir: TEST A—On November 1, 1916 at 6 p. m. the North Head Naval Radio Station (NPE) at the mouth of the Columbia River will send a test message to all amateurs, transmitting on 1512 meters and at a speed of ten words per minute. It is requested that upon reception of this message you have some witness certify as to the recep- tion and that you mail a copy of the mes- sage as received to this office. The Puget Sound Naval Radio (NPC) at Bremerton, Wash., will send a test message at 7 p. m. November 1, 1916, to all amateurs, transmitting on 1512 me- ters and at a speed of ten words per min- ute. It is requested that upon reception of this message you have some witness cer- tify as to the reception and that you mail a copy of the message as received to this office. TEST B.—Information will be broadcast- ed by the North Head and Puget Sound Sta- tions as to Test B and this information will be imparted 24 hours previous to this test. Test B will otherwise be as per Test A. A copy of the message received and certi- fied by witness is requested. TEST C.—Same as for test A except that no advance information as to time of send- ing message will be given. Copy of message as received and signature of witness is re- quested. Station Yours very truly, E. J. BLANKENSHIP. By the time this is printed this test will be completed. We hope everything worked out all right with NPE. We are promised the results by Mr. Blankenship and will print them in due course. Continued on Page 357 || District |
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November, 1916 MONTHLY REPORT OF TRUNK LINES AND A. A. Hebert, Manager Members will please note the following changes on the appearing in the October isssue: report Line “C” UPPER MONTCLAIR, N. J. 2ZE, P. F. Godley. YONKERS, N. Y. 2ABG, C. R. Runyen, Jr. JACKSONVILLE, FLA. 4EI, John C. Cooper, Jr. Since the last report no other STAR t1 unk relay stations has been developed, although several tests are now being conducted with the view of extending the long distant work. The Bi-Weekly test messages were started on September 14th, but it is with regret that I have to that so far the work has not been satisfactory, due to the fact that two of the stations on which we depended, are closed and the operators employed on ships for the present. The relaying of messages has started in in earnest in this vicinity, and good work is being done by 2ABG, 2LK and 2AGJ, but unfortunately we are having trouble with the western business, and cannot yet handle it through the regular channel—most of it being diverted to Line “A” through 2AGJ. However, it is hoped that the next month will see a great improvement, as several of our members are now working on their stations, and all are desirous of accomplish- report ing results, The Southern Stations are taking a great deal of interest in the work, and from reports received there is no doubt that very QsT 344 efficient work will be done this winter. Mr. W. T. Gravely, 854 Main St., Danville, Va. (8RO) has been formally appointed Dis- trict Superintendent, and will have charge of all stations in Virginia and North Caro- lina. Mr. John C. Cooper, Jr., Atlantic National Bank Building, Jacksonville, Fla. (4EI) called on your manager the early part of October, and has consented to accept the appointment of District Superintendent, and will have charge of stations in Florida and Georgia. All members of the League and Amateurs interested in our work in the states men- tioned should communicate with the _ re- spective Superintendents, and we can feel assured of complete success if every one will co-operate with the Superintendent of their District. Branch 1 has been inaugurated, and runs between Albany and Atlantic City, N. J., and the following is the route: ALBANY, N. Y., 2AGJ. PEEKSKILL, N. Y., 2CE YONKERS, N. Y., 2ABG. ASBURY PARK, N. J., 2ARI. ATLANTIC CITY, N. J., 3RF—3RQ. A. A. Hebert, 246 Highfield Lane, Nutley, N. J. oo OF TRUNK LINES AND “F” REPORT “A”, By R. H. G. Mathews, District Manager. Your manager, after being literally be- sieged with mail from Iowa, has decided to create a new Trunk Line F, running through Iowa and Nebraska to Denver, there connecting with route B, under Mr. Seefred. Mr. Ralph Batcher of Toledo, Iowa, has been appointed local manager of this route which will be under the same management as Routes A and E. Full de- tails as to the organization of this new route, F, are not available but a full report will appear in a later issue. In the mean- time, all members desiring positions on this route should communicate with the District Manager at Chicago, through Mr. Batcher, at Toledo. It is probable that this route may event- . 7 REPORTS ROM YU MAANAGERS
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ually sup} the old route “A West” as the inter on A west of Chicago, does not seen be alive, several of the import- ant stations not having been on the job for on message. If the delinquent membe Route A do not show a little more int t least to the extent of an- swering Manager’s letters, this route will be to run through Iowa instead of the wv t w runs. A g efficiently working route F is desired applications for positions on it will comed by Mr. Batcher and myself The oth outes, E and “A east” have display ficient enthusiasm to make up for that ng in “A west”. As an ex- ample enthusiasm, I will tell the following ttle incident. Mr. W. E. Antony, 5ZS, of Shreveport, La., w a position on Route E. His letter becam¢ t in my pile of mail and so went ul wered for about four days. At the er time, Mr. Antony sent me a twenty-five word Western Union telegram isking appointment and an answer by teleg Needless to say, he receiv- ed h ntment. We want men with Mr. A “push” in our League, and I know that he will be a valuable acquisi- tion this appointment, Route E now re follows: CHICAGO, ILI IK, R. H. G. Mathews. MATTOON, ILL GY, | \. Kern. LOUISVILLE, ILL 9ZL, Budges. CAPE GIRARDEAU, MO. ONN, H. B. Deal. CAIRO, ILI | B. Warner. LITTLE ROCK, ARK. 5BY, J. M. Clayton. XO, E. Cornish. DALLAS, Tex 5ZC, F. M. Corlett. HOUSTON, TEX. 5E0O, J. L. Antry, Jr. SHREVEPORT, LA. 5ZS, W. E. Antony. 345 QsT November, 1916 NEW ORLEANS, LA. Several more branch routes have been Among them are: BRANCH 1 CHICAGO, ILL. 9IK, R. H. G. Mathews, KENOSHA, WIS. 9BK, H. C. Boardman. MILWAUKEE, WIS. 9AOL, C. Bates. BRANCH 2 CHICAGO, ILL. 9IK, R. H. G. Mathews. LANSING, MICH. created. 8ACD, R. Palmer. SAGINAW, MICH. 8AAK,—? DETROIT, MICH. °° BRANCH 3 CHICAGO, ILL. 9IK, R. H. G. Mathews. ELGIN, ILL. 9EY, L. J. Simms. BRANCH 4 ST. MARYS, O. 8NH, Mrs. Chas. Candler. INDIANAPOLIS, IND. (9GU, 9JL.) BRANCH 5 CHICAGO, ILL. 9IK, R. H. G. GARY, IND. 9AAB, P. West. Mathews. BRANCH 6 LOUISVILLE, ILL. 9ZL. CENTRALIA, ILL. BELLEVILLE, ILL. 9FR. E. ST. LOUIS, ILL. 9QZ. GRANITE CITY, ILL. ST. LOUIS, MO. 9VP. BRANCH 7 MATTOON, ILL. GV. | a |
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November, 1916 DECATUR, ILL. 9NW or 9KN. SPR'INGFIELD, ILL. 9AGN. BRANCH 8 FALL RIVER, MASS. LZF. NEW BEDFORD, MASS. \ 1ZN. BRANCH 9 FALL RIVER, MASS. 1ZF. CUTTYHUNK, MASS. IKV. BRANCH 10 FALL RIVER, MASS. TAUNTON, MASS. LEC. BRANCH 11 FALL RIVER, MASS. IZF. ATTLEBORO, MASS. LABS. BRANCH 12 FALL RIVER, MASS. IZF. PROVIDENCE, R. I. 1LAEM. BRANCH 13 FALL RIVER, MASS. LAKEWOOD, R. I. 1BT. BRANCH 14 FALL RIVER, MASS. PAWTUCKET, R. I. ITU. BRANCH 15 FALL RIVER, MASS. IZF. NEWPORT, R. I. 1TI. BRANCH 16 ST. MARYS, OHIO—S8NH. Time: Friday, 1:30 p. m. QST Toledo and Michigan points, 8JD. BRANCH 17 ST. MARYS, OHLO—8NH. Fort Wayne, Ind. Time: 9WF, Daily, 4:00 p. m. 9VF, Nightly, 12:40 p. m. BRANCH 18 ST. MARYS, OHIO—S8NH. Indianapolis, Ind. Time: 9J1, Daily, 3:45 p. m. 9EG, Daily, 8:30 p. m. BRANCH 19 ST. MARYS, OHIO—8NH. Cincinnati, Ohio. Time: 8ACK, Wed., Friday, Saturday, 1:00 p. m. BRANCH 20 ST. MARYS, OHIO—8NH Columbus, Ohio. Time: SIK, Time not definitely arrang- ed. SYO. Other routes will be added as the Trunk Line operators succeed in organizing them \ te book containing these lines will be compiled and mailed to all stations on Trunk Lines A and F, : 0 is a sufficient number of branch lines are created. From the outline above, it will be seen that 1ZF has been an extremely busy young man. He is another example of the kind of “pushers” that we have in our League. Test messages have bee ent reg ilarly from 9IK on every Monday and Thursday at 10:15 p. m., Central Time. On the whole, these messages have been successful, most of them getting through on Route A east without trouble. Route FE is temporarily tied up because station 9NN is not work- ing at this time, due to the fact that Mr. Deal is moving into new quarters Route A east makes its Manager proud of it. The record on this route is a mes- age relayed clear through to New York and a QSL back to Chicago, fifteen minutes after the message was sent. That beats the Western Union, Fellows Thi record was made on the night of September 28th through extremely heavy static and during Chief credit for this speed goes to Mrs. Candler at St. Mary’s Ohio, and Mr. J. K. Hewitt at Albany, N. Y., who worked with each other through the static without difficulty. Get a move very Warm weather. | | | i + | ot &
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347 QsT ws of Route A west and on ( Route | e letting a woman “show ’ time The results secured on R highly gratifying, due large Torts of Mrs. Candler, but thos the outes are not at all at Rout [ have said, temporarily l QONN, but there is no } Route A west. Now fel- low nto this relay game and get t es through just to show that we t. I would like to discon- tinue t of test messages by the it I must keep sending m an handle them success- Al as to routing, test mes- sag greatly appreciated by all concer} elay work. oo LONG DISTANCE WORK Seve lrunk Line stations have ‘ tations heard by them during t month. Among these are Heard at 9GY, Mattoon, III. SAT SPA, 8CS, 9PC, S8AOR, SAO! V, 9VH, 8CI, 9IK, 8CX, 9AAB, 8JZ, SNI Heard at 9IK, Chicago, Ill. 2AGI NH, 9PC, 8AEZ, 80H, 8AOI, SAO! EG, 9GY, 9VP, 9ABD, 5DU, 9AAB, SCS, 8NF, 8JX, 5BV. Mr. | it Louisville reports 9GV, SNH trong on test messages. Mr. W. D. Woodcock at Buffalo, N. Y. ren 8NH, 9GV, and QIK all ong h heavy static on September Heard at 8NH, St. Marys, Ohio. 9GI 9IC, 9IK, 9DB, 9AIK, 9GY, 9EG, OI \V, 9AHK, 9WO, 9JI, 9GJ, 91 NW. 9ABD, 9ACS, 9ACM, 8KS, SCs, § 8FO, 8AOI, 8CL, 8DT, 8NQ 1Z, 8NF, 8JX, 9NN, 8AKM, SWWw SSK, 8JO, 8BX, 8NY, 8ACK, 2AGJ, LK, FD (Bristol, Tenn.) R. H. G. Mathews, District Manager, 1316 Carmen Ave., Chicago, IIl. November, 1916 REPORT OF TRUNK LINES “B” AND “F” The conditions now being favorable, we expect to make our first tryout of the relay stations on Saturday night, October 7th. We have a new oil immersed condenser and rotary in connection with our old “helix” type oscillation transformer and one half Kw. transformer. We have already worked 6BJ (Centerville, Cal.) and 6BY (Richmond, Cal.) direct, so it will be seen we are prepared to do our part in making the work a success. On the night of September 27th, we mail- ed a card to every relay station on our Trunk Lines announcing our first test mes- sage which will be sent out from here on the night of October 7th at 10:00 p. m., immediately after NPG’s time. We re- ceived many “QSL’s” to the same. Here- after a test message will be sent out each week at the same time until further no- tice. We have changed the routes so as to take in the best stations, as you will see by the enclosed report. Following is given a line-up of the differ- ent relay stations on Trunk Line B and F: co TRUNK LINE “B”" Portland, Ore.—KDP. La Grande, Ore.-——-7ZH. Pocatello, Idaho—7SP. Salt Lake City, Utah—6ZV and 6SL. Victor, Colo.—KIW. Denver, Colo.—KIX. Lincoln, Neb.—9XT, 9RB, and 9AHR. St. Joseph, Mo.—9HU. Leavenworth, Kans.—FJ. 9QV and 9JW. Lawrence, Kans.—9XP and 9LQ. Kansas City, Mo.—9XT, 9MQ, 9EP, and 9LO. Topeka, Kans. Continued on page 357 | | |
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November, 1916 QST 348 SINCERE FLATTERS When operating, he pulled one off something like this: “He that filches from me my good name Shakespeare was Robs me of that which not enriches him And makes me poor indeed.” He had a way oi getting things straight the first time, and we have a hunch here at headquarters, that the feeling we are con- cious of in our midst is just about the same as the which the late William had when he filled in the message blank above one mentioned. Our mail indicates more clear- ly daily that advantage is being taken of the confusion which exists between our name, THE AMERICAN RADIO RELAY LEAGUE and a certain other organization combining all the words in our name except “RELAY”. The amateurs of the country must keep this in mind because it is be- coming a matter of greater importance every day. Our organization began over THE NEXT For months all hard to make QST the success which we all felt it deserved. Here is our twelfth num- ber. Each one of the tweive showing a gen- eral improvement over the previous copy. eleven we have pushed Our first issue of December, 1915, con- tained only twenty-four pages. This issue has sixty. The first issue had six and one quarter pages of advertising which this issue has over twice as much. The Decem- ber copy which follows tais will be the Anniversary Number. In this QST, we hope AMERICAN Rapio RELAY LEAGUE a year earlier than the one which we feel is copying us, and the idea of joining to- gether all of us amateurs into a working organization, started with us. We recog- nize it is a pretty good form of flattery to be imitated, but when application blanks intended for one organization are received by the other organization, and when ama- teurs join one thinking they are joining the other, we begin to think the weather We some day, in justice to those of mislead in the and the present time coming along and who are likely to be mislead in the future. Until we actually throw the switch, however, and the key, we want the amateurs of the country to thoroughly understand that confusion as to and that they must look for RELAY whenever they are That word RELAY is turning warm. to do some- this who have been who expect thing about us are at past, those press names exists the considering us. word is us. NUMBER to show a still further improvement which will make everyone of us feel glad he has played a part in making this magazine of the amateur, by the amateur, and for the amateur. But now let us keep up the good work by telling all our radio friends of the great success and the coming issue. Many have not yet subscribed. Help these to get their dollar for a year’s subscription and you will be helping QST. Who dares to predict what strides we may make during the coming year? j Ed i t i Ir = ‘one
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League season, tempted before. QsT November, 1916 THE MESCO CATALOGUE the latest copy of the Telegraphy gotten out Electrical Supply Com- little book is recognition, To of this the catalogue is a wire- iratus and all the things Data an extract dia- the or calculating kes to know of. may be found Government laws, reviations, the abl curves manner of interesting ook which will start ght path ates more to us than apparatus offered for the trend of amateur scribed with a rough print on an equally rough piece of paper. Apparatus is de- signed and constructed with the greatest amount of care. The instruments have become standardized to a certain extent and this whole atmosphere is felt when one looks over the pages of the Manual of Wire- less Telegraphy. Every page contains only the best of material and there is nothing which one would hesitate in recommending. Among the new instruments offered to the amateur trade which promise experiment- ing along research lines are: Standard In- ductances, Calibrated Condensers, Resist- ance Boxes, Phantom Antenna Resistances, Spark Indicators, ad Audibility Meters. We will that hope all our readers secure a copy and we feel confident no one will be disappointed after looking it over. ROTARY GAPS are wireless instru- ther ove night and de- e of this issue is the Synchronous Rotating terman reprinted from 1916, Electrical World. ondenser for a non- gap has long been one wish to compliment the coming out with such sion and right here we the Electrical World is technical papers of the shame that so Es- we find This ar- we seems a generation read it. st every issue data the vi ‘ less rule and m to A. R. R. L. part of know n the eastern be interested to foot to hold a conven- members who some time during the Nothing like this We have Societies of can Clubs o discuss scientific ques- and there has never been a erating amateurs to discuss inter- been have missed a most had not amateurs would esting paper if granted for the reprint. permission The speed of the gap, size of the con- denser, amount of inductance, radiated en- ergy, and length, has long been a question which we amateurs have puzzled Here is an wave over. article by Mr. Blatter- man which covers the question in a man- ner which will be clear to all of us. No longer will it be necessary to argue blindly alout high notes and low notes of rotary No the condenser should be large or This data is of greatest importance to all of us. gaps. longer will we wonder if small. CONVENTION It would be intensely who hear each operating questions. interesting for many other nightly to meet of us and get acquainted. The attendance at convention would be of course Many members would come from a distance of a such a mostly local. few miles. Several would probably come from a hundred and fifty miles. A few would come from five hundred miles. In the east this would mean a very large attend- ance, in all probability. Just the same, it 319 pa T It n ptic ip ° of
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November, 1916 QsT 350 would not be by any manner of means, country wide. This is usually met by such Societies as the Institute of Electrical En- gineers, the Institute of Mechanical Engin- eers, etc., etc., having branches organized and meet in the other large centers of the country. We could do the same. The fel- lows for some distance around might meet in Cleveland Ohio, for example. There would be many who could get to Chicago. Probably St. Louis would draw a large num- ber. In the Northwest, Portland or Seattle would be centers and in the Southwest, San Francisco and Los Angeles would have a large number of stations to draw from. After the meeting in New York, it will develop what the sense of the great body of amateurs is. If it seems to be something which appeals to the majority of us, we could nominate representatives from the representatives thereby eastern section to meet from teh western sections and spread the intimacy of actual personal con- tact. The plan is being developed and in sub- sequent issues, we hope to give further de- tails. PUBLICITY RELAYS According to circulars which many of us have received, there is to be another RELAY soon. Like the others which we have had, it comes from the middle west, notwithstanding that ieminates from Wash- ington, D. C. It is proclaimed in pretty bold type, but somehow the prizes offered for the one who breaks in on Mr. Hughes with it first, and the one who gets a lot of signatures, etc., etc., cause many of us to lose some of our interest. The thing smacks of something which does not taste well nor sit quite comfortably. The stations of our League are of course supposed to handle any respectable mes- sage which comes along, and our mem- bership will be glad to handle the Relay which is now striving for publicity. It should be borne in mind however, that it is not a matter which is handled officially by the American Radio Relay League. If we were sure it was strictly to the interests of all of us, we would welcome it with open arms, but if it is intended for the special interests of some one, then we look at it differently. Our ‘idea of a general relay is more like the one described elsewhere in thi: issue, and which is being run between the different Naval Radio Districts, and ALL OF US. MONTHLY STATEMENT OF QST Statement of the Ownership, Manage- ment, etc. required by the Act of August 24, 1912, of “QST,” published monthly at Hartford, Conn. for October 1, 1916. Editor, Clarence D. Tuska, Hartford, Conn.; Man- ager, Clarence D. Tuska, Hartford, Conn. ; Publishers, The QST Publishing Company, Inc., Hartford, Conn. Stockholders holding one per cent. or more of total amount of stock: Clarence D. Tuska, Hartford, Conn. Other stockholders holding one per cent. or more of total amount of stock, nore. Known bondholders, mortgagees, and other security holders, holding one per cent. or more of total amount of bonds, mort- gages, or other securities: None. CLARENCE D. TUSKA, Manager. Sworn to and subscribed before me this 28th day of September, 1916. CECIL POWELL, Notary Public. | i ane > 3 ‘tr
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QsT November, 1916 WHO’S WHO IN AMATEUR WIRELESS We shall publish each month two pictures of amateurs who have become known by call letters. This will draw us all closer together. We are often curious as to just what the other fellow looks like, and here’s our chance to see.— Editor F. SEEFRED H. C. SEEFRED — 6EA — Here’s a Who’s Who which is one we have all been locking for. The Seef re Brothers have been counted among the most earnest of the League workers. They have taken hold of the Pacific Coast Trunk Line Route nd have shown what can be done if one will only put a little en- t thusiasm in the work. Before Seefred Brothers had taken the Trunk Line Managership, the Pacific Coast interest in the A. R. R. L. had an awful decrement, but now the interest has a sharpness which would pass any Radio Inspector. This is due to the earnest efforts of H. C. and L. F. Seefred. They are 22 and 21 years respectively, natives of Los Angeles, Cal. | the past nine years they have been in the radio game and operate station 6A. Many of our Pacific Coast friends have heard of them, but this will be their first meeting. 351 — — :
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November, 1916 Radio Communications by the Amateurs OUR WESTERN CORRESPONDENT Mr. Winser, our Western Correspondent, sends in such interesting data to the Editor that it is to our general interest to read a few extracts from his report. “I was very much interested, on looking over Mr. Hebert’s report in the August is- sue, to note the number of special stations there are. It is good to see that the U. S. Radio Service appreciates the value of the LEAGUE organization and is willing to help us out with a 425 meter wave on long hauls. I have been absolutely cut out of any chance at summer work by a phenomenon which I have never mentioned to you before on account of my inability to do so without resorting to language prohibited by the Postal authorities. This phenomenon took the form of an electrostatic brush discharge across the insulators of a neighboring high tension line. On wave lengths from 600 meters down, it produced a noise in the phones closely resembling Niagara at short range. The trouble is a regular all- summer performance, but is entirely ab- sent during the winter months. A recent storm put a stop to i¢ for this season, leav- ing me ready to start amateur work as soon as the “Chinese Government” per- mits. Our little magazine is certainly getting to be “Bear Cat” and its influence is being shown in a great many different ways. Wit- ness the changed relations between™ the amateur and the manufacturer. A year or so ago, it was the manufacturer who set the fashions in radio equipment. Today, the advanced amateur figures out some- thing god and then there is a race between the manufacturers to see who will get it on the market first.” (Sgd.) LINDLEY WINSER, 6ZW 4 THE CHAMBERS CIRCUIT Philadelphia, Pa. Editor QST, Dear Sir: Without the least desire to enter upon any controversy with any of the writers of QST, I feel called upon to make some reply to the uncalled for insinuations contained in the article in the September issue of the maga- zine, headed “Audion Circuits” by Mr. Paul F. Godley. There is much in Mr. Godley’s article to be commented upon, and much to be ignored. I propose to ignore the sum and substance of Mr. Godiey’s somewhat caustic criticism. My purpose in presenting to the readers of QST an article on the Chambers Circuit was to give an economical method of receiv- ing the undamped waves, or Arc’s, in a far more satisfactory manner than has ever be- fore been possible. That the “Chambers Circuit” has accom- plished this, has been proven in dozens of cases, under my many others; as is attested to by the num- erous letters I have received. In conclusion I want to present a copy of just one of the letters which I have received this immediate notice, and in week: West Chester, Pa. Mr. E. C. Andrews, 22nd & Morris Sts., Philadelphia, Pa. Dear Sir: I read your very interesting article on the “Chambers Circuit” in the August QST have tried it out with wonderful I have tried everything to get the believe me this is the real dope. am now and re- sults. Are’s, but I saw it in a borrowed sending in money for a subscription as the QST looks good to me. I will now be a sub- copy, so 4 is ~ QST 352 | = rt.
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QsT November, 1916 many more articles HEARD AT VALLEY STREAM, L. L. QST, Hartford, Conn. Ke. J. SCHULTZ. Gentlemen: ®LK station shows the follow- ‘ outside of the second district, st bs were copied during September: iZL, 11Z, iZD. 3AEP, 3ZS, 3WN, 8AHR, 8QD, 8NQ, SNH. 8AEZ, 8KS, 8PA, 8ZW, 8AKM, &8CL, 91K, 9PC, 9ACM, The log of ing stations, Philadelphia, Pa On September 24th this station accur- ~~ ately worked 8NH and SAEZ through con- ae siderable static. This record is for eighteen out of the thirty days of September only. iORE CALLS The writer started the practice of send- \rlington, Md. ing cards to the various stations heard, as 1 Vi izgested in QST, but as yet not a single H acknowledgment came back, so has dis- September QST | continued it. otic h interest, Mr. Spen Cordially yours, (Sed.) J. O. SMITH. good idea and hope pon the suggestion. oo olling. I am enclosing | have heard between OUR PRESIDENT GETS LONG DIS- 1915 and April 19 TANCE. IS YOUR CALL HERE? large, but some ee his call. They Just to carry out the idea of letting h other know when we hear him: DA. 2KK. 2MA, 2RL, had the pleasure to the 2DI IQ, BD. 8YC, 8DZ., lowing stations on the night of Sep- 2NH. SIF. mber 29th, between 9:00 and 11:00 p. m and readable in SAA] W. 8NN. 8JZ. 8TD, The signals were strong, mentioned, so that the call let- ea every ZT, 81 P. 8CS, 8NT, 8UE, 8XC, gNQ CONN. 9FY. ters were absolutely certain, and the mes- 1a Wi sages in many cases were read. The re- hould hke to mea- * mu ceiving was done on one of the new Grebe Arlington 1s just — short wave regenerative receiving sets, and this record is the first test made with this instrument here in Hartford. Its high effi- iency speaks for itself. . ipler, Fixed condenser, OPC at Fort Wayne, Ind. G m Murdock phones, 8KS at Cleveland, Ohio. | SNF at Battle Creek, Mich. SHB at Cleveland, Ohio. \erial oZF. 9YK. 8OH, 2ZV were also read. In . wires spaced about 18 the case of 8KS, who had a relay message " nen feet high. to Bill McCutcheon, 107 Hancock Ave., De- T e of service to the troit, Mich., this was read here in Hartford League r and wishing both the the first time he sent it. All the troubles greate ' | remain ever yours, of 8NF in Battle Creek, Mich. and his final * ‘ R. Sherwood, Jr. suggestion that the message be relayed * | tl Deceiving Set ig
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November, 1916 through 8AEZ were heard distinctly. 1CM in Laconia, N. H. also came in loud enough to be heard with the phones on the table. On Sunday evening, October ist, 8NH, Mrs. Candler of St. Marys, Ohio, came in loud and readable, except when interrupt- ed by local QRM. When any one hears my signals, 1ZM, will they please say so in QST. HIRAM PERCY MAXIM. oo MESSAGE PREAMBLE 207 Parkwood Blvd., Schenectady, N. Y. Mr. C. D. Tuska, Editor QST, Hartford, Conn. My Dear Mr. Editor: I was much interested in Mr. Winser’s suggestion in the August QST. I expected to see some further suggestions in the September QST, but did not although I read it all, ads included. While I have done very little relay work, I am in the game and would like to see some system adhered to as Mr. Winser suggests As I have suggested before, when blanks are printed, it would be very con- venient if they were so printed as to be filled in in just the same they should be transmitted. The preamble suggested is very good, but I would like to ask Mr. Winser and others if “w” and “da” (being shorter) are not better than “2ck” and “date” tively ? I would say that it would be useless to new order as any respec- give the hour of filing any closer than five minutes, but that we send 805 and not 85. I think the rest is clear. Very truly yours, W. L. BROOKS, 2ZB. oo CALL SIGNALS Little Rock, Ark. Dear Mr. Maxim: The September today—let received upon the of QST copy me compliment you QsT 304 excellent reading matter presented in it. I think it is the best amateur wireless mag- azine. Following Mr. Spencer’s plan of reporting extracts from the logs, I have copied the following within the last year upon a De- Forest audion: 5ED-5DO-5ZA-5XC-5AD- 5ZB-5ZC-5Z1-5AA-4AF-4DG-4AT-9XK-9J F- 9IK-9IC-9EE-9JT-9LT-9XC-9J B-9Y A-9YGO- 9YK-9XE-9X T-9UC-9IO-9LM-9IT-9XL-9XN -9XP-9XV-9IF-9AU-9KD-9KU - 9FW - 9LR- 9DG-9ACS-9ABD-9YD-9BW-9DX-9ZA-8TI - Any amateur who hears 5BV or has heard 5BV, after April, 1916, will confer a great favor upon me by notifying by a card. 9UC comes in particularly loud and steady. 4AA, so I understand uses a 1-4 Kw. Packard and has worked with 8AEZ, a distance of nearly 600 miles. Wishing QST the best luck ever and hop- ing it will continue to be the good maga- zine that it is, I am Yours truly, (Sgd) JOHN M. CLAYTON, 5BV. The Who’s Who is FINE. oo CHANGE OF ADDRESS Last month we had an exceptionally good few of our failed to receive it. What was the trouble? Was it any fault of ours? On investigating, we find that a great many of the readers change their address, but neglect to inform us of the change. This causes a great deal of QRM and these same subscribers come back at us with a QRU? in capital letters. If you are about to move to a new address, just drop us a card and we shall see that your QST does not go astray. issue and a subscribers Synchronous Gap. Cont. from page 332 low frequency charging current, however, is very small, being, in these experiments, of the order of 4% of 1 per cent. of the total indication and can therefore be ne- elected. Errors of observation of speed and meter readings probably amount to 2 per cent or 3 per cent, the latter due pri- marily to slight variations in the spark. j | fee | 1 >
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November, 1916 This new department has been opened up for the benefit of the readers of “QST”, Lette: ild be addressed, “QST”, care of The American Radio Relay League. The Querie lepartment, Hartford, Conn. The questions will be answered free of charge | and as promptly as possible. The answers will in each case, appear in “QST”, pro- vided | er, they are of interest to the average reader. We are nov in a position to answe tions requiring a long, mathematical solution. The Editor hopes to receive a large number of interesting questions for the next iss H ists that you will make your questions of general interest and will re- frair m asking questions which you can answer by consulting the Radio Laws and th Letter Books. “QST” does not wish to pad this department out with a series of uninteresting, foolish, questions. Arth Penna 2. Which is best, the round or tubular on audion bulb. The iring induction which you hear is , = : It seems to be a matter of opinion. in all p ty due to a noisy commutator on an a rht generator in your local Ed 1 Howl NJ af ywiett, power! to a leak from a nearby ERE high-t transmission line. If the lat- 1. We cannot tell you to what wave- ter 1 by be ited by following the lines Jengths the coil you mention will tune with a table receiving set. In many without knowing the antenna constants. localities the owners or radio stations co- Twenty taps will suffice for the coil. operate with the lighting companies in lo- 2. For calculating wave-length of your cating e of this sort to the advan- antenna see reply to W. J. King in October tage of neerned. issue. Frank tial tor and Russell Blair, Ohio. 3. The gap you mention will probably l. Car give diagrams of regener- cuit your purposes. ative a ’ eceivers for short wave- length | also a brief descriptio ) on lescription of Francis R. Pray, Mass. same See Fig. 17, page 200 August “QST.” 1. See “Applications of the Audion,” 2. For ating wave-length of an- August “QST.” tenna s¢ eply to W. J. King in October 2. The construction of the “Trons” is issue “QS17 identical. G. W. Lilienthal, N. Y. a. many pounds of wire will I need for the primary and secondary respectively of the auto-transformer described in “Appli- catior f the Audion,” August “QST”? One and one-quarter and one and five- eighths pounds each respectively. A. C. Young, N. Y. 1. By using an Audiotron bulb as an amplifier with a galena detector, would bet- ter results be obtained in receiving spark stations than if the bulb was used seper- ately, and why? Results might or might not be better de- 355 | \\ RIES D as { |
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November, 1916 pending upon the efficiency of the particular audion used. On the other hand if a re- generative circuit is used such as described in “Applications of the Audion” August issue “QST,” the results with the Audion alone would be far better. 2. Increasing the height of the antenna will increase the wave-length providing the flat-top portion remains the same lengths. An increase in height should enable you to do better work both with transmitter and receiver. 3. We do not understand what you mean by “which style rotary gap.” 4. As we know the D. L. & W. have discontinued the use of radio stations on their trains. As we under- stand it this service was merely temporary. far as passenger Cedric E. Hart, Utah. l. We familiar with the struction of the auto transformer you men- tion are not con- 2. Best results will be obtained if a vari- able condenser having a maximum capacity of at least .0002 is used in the grid lead of the audion. A capacity of .02 would be entirely too large. Harvey, l. How series-parallel ? are condensers connected in When connected in this manner twice as many plates will be needed to give the same We are of the opinion that the make of rotary gap has very little with the results obtained at the transmitter. Most amateurs make the fatal mistake of trying to run their gaps at too great a speed, thus failing to give the sufficient time to full charge. capacity as before. to do condenser receive 2 QSsT 356 Wm. R. McCaleb, Penna. used the Worn out dry batteries can not be successfully in the wing circuit of audion. Henry Klaus, Ills. A single wire 350’ in length and 50 feet or so in height will be sufficient for the reception of distant long-wave stations pro- viding a properly handled Armstrong cir- cuit is in use. We do not understand your last question. Mr. John J. Bueb, Jr., Conn. 1. The Multi-Audi-Fone consists of a telephone receiver and a microphone in modified form mechanically connected. The incoming signal actuate the telephone re- ceiver which in turns actuates the micro- phone, this in turn operating a local bat- tery circuit which includes a second tele- phone receiver of low resistance. 2. What condenser capacity shall I need for a 4 Kw. transmitter with a rotary gap running at about 200 R. P. M. A capacity of .005 should serve the pur- pose. 3. Can I make an Ultra-Audion of an R. J.-4 by adding a variable Where do I add the condenser? See “Applications of the Audion,” August issue “QST.” condenser ? John C. Lewis, Jr., Maryland. 1. Commercial lighting current whether A. C. or D. C. cannot be used for the wing circuit of the audion due to the noises pro- duced in the telephone resulting from com- mutation of the generator. 2. The hook-up on the second page of the May issue should prove efficient for short wave work. This is a regenerative circuit. See also “Applications of the Audion” August issue. Fred Dickely, New York. 1. For the wave-length of your aerial see answer to W. J. King in October issue “QST.” 2. What do you consider the best contact for silicon? 4 AS | iy 4
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357 November, 1916 Most ship and shore operators use a small you direct concerning plans for radio tests piece of an “E” steel mandolin string. with amateurs of the San Francisco dis- Is it safe to have a ground wire run-_ trict of the Naval Communication Service. ning through the house? The tests will be made some time during The | nderwriters would not pass the month of November. Plans are now such a! ingement. under consideration and your recommenda- E. B. N. J. if vill tell us what you are trying mention for, we will be to use glad to g iny information we can. Lawrence B ng. Cal. l. Doe make any difference in receiv- ing whether there are one or more wires in the It is tl actice at stations employing separate ils for sending and receiving to empl single wire for reception, . inasmuch as the increase in signal strength if any justify the expenditure : necessary f the second. Trune Line Report. Continued from page 347 Cape Girardeau, Mo.—9NN. TRUNK LINE “F” San Diego, Ca 6SR and 6WF. Pomona, Ca 6AAG. Los Angeles, Cal 6EA. Bakersfi Cal.—6ZW. Fresr 6RD. Center Cal 6BJ. San | co, Cal.—6SC. Berk« Ca 6WL and 6JZ. Richmond, Cal.—6BY. Stockton, Ca 6SH. Ione, 6RJ Acamp Ca 6PN. Reno, N« HB. Portlar Ore.—KDP. Seattle, Wash 7TNG. At present we need relay stations very badly at the places marked (?). Seet Brothers, Trunk Line Megrs., 443 So. Freemont Ave., Los Angeles, Cal. Amateur and Goy’t Tests. Cont. from p. 343 San Francisco.—‘“In accordance with or- ders of the Pacific Coast Communication Superintendent, I am corresponding with tions will be followed as closely as prac- ticable. I shall be pleased to keep you fully informed of all details. The San Francisco district comprises the States of California, (north of San Diego district) Nevada, Utah, and Colorado.” This is a big district and there are a lot of amateurs and many very good ones. We expect great things from this test and will report it with much in- terest. The rest of the country will cer- tainly be interested. New Orleans.—‘“In reference to your let- ter dated September 16th, 1916, and Direc- tor Naval Communications letter 14680-11- A, of September 14th, 1916, in regard to conducting tests with amateur radio sta- tions in this district; I have to inform you that the District Communication Superin- tendent Lieutenant E. H. Loftin, U. S. Navy, is at the present time on duty at the Navy Department, Washington, D. C. Therefore, during the absence of the Dis- trict Communication Superintendent, I would suggest that no action be taken in the way of tests until Mr. Loftin returns to this District, on or about November 15th, 1916.” The above shows the way the Government is willing to co-operate with us amateurs. Tests along each coast and extending far inland will eventually be made. Let us all hope that a good showing will be made, es- pecially on Test A and B, for which advance notice is given. Test C, having no advance notice of any kind will of course only be caught by those of us who are on duty regu- larly. The chances are the latter will get the star position in the records. It is suggested that every amateur co- operate in these tests whether he is regis- tered in the Government book, a member of our organization or not. All he has to do is to send in his copy of the message for receiving only, so the timid ones need he receives. The law requires no license have no qualms about disclosing the fact that they have a detector and a loose coup- ler and know the code. = | |
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November, 1916 QsT Wireless Spirit By A. Nony Mous The Wireless Spirit does not resemble its namesake, in that it cannot be bought in bottles like other well known spirits, but like its nickname “Bug” (and hereafter referred to as such) bites you when you least expect it. Among some of the very marked symptoms which are noticed after a bite may be mentioned:—insomnia, acute wasting away of the pocketbook, loss of fu- ture Salvation, discoloration of the hands, unintelligible conversation, occasional swell- ing of the head, kleptomania in the direc- tion of homeless copper wire, and even sometimes cessation of diplomatic relations with the family. This bug usually attacks males but has been known in a few in- stances to have attacked females. It ha no respect for age and like measles and love, the older you are, the harder the at- tack. It flourishes mostly in the temperat zone and unlike other bugs, it hibernates in the summer during which period, tem- porary relief is afforded the victim. He gets more sleep and his pocketbook is re- lieved on one score. This bug has such habits as would please a nature-faker, fo it has been known even to cause holes in tin roofs. It has a very monotonous cry, when calling to its mates on a cold winter night:— —— ———. When a young man has been bitten and can say oscillation transformer, galena, condenser, etc., with out consulting a book, he gets so inflamed and enlarged that it takes a neighbor sev- eral minutes to walk completely around him. The Wireless Bug like everything else has its enemies, the most important of which are the Electric Lighting Co., Tele- phone Company, Static and the rest of the victims family who even go to the extreme of destroying wireless catalogues in which the bug is often hiding. This pest is claim- ing every year more and more victims from our best families. A great many antidotes have been tried by friends and relatives but there is only one cure—A commercial station in the same city. ERRATA Mr. George C. Barney’s call should read 1ENU instead of 1XK. Mr. Eurcile L. Shaw’s call should read 8PQ instead of 8PA. tu Big Money in Electricity Che electrical industries offer wonderful oppor nities to boys with a liking for Electricity. ‘The salaries paid to trained men are large, promotion comes rapidly and, best of all, the work is fascinating. The discovery and development of new lines (such as wireless telegraphy and telephony), from time to time, promise attractive and paying fields to those who wish to specialize. The cell to do and Sp ectal Training will bring success to you. Che International Correspondence Schools can help you to become an expert in electrical work, no matter what branch you like best. Thousands of young men have already won success through I.C.S.help. You can do as wellasanybody, i/you try. Everything is made so clear that you can learn in your spare time, regardless of mi: sts you nothing. | | | | | | | | | | | where you live or what your work. No books to buy. There’s big money in Electricity. Get after it by irking and mailing the Coupon today. Finding out INTERNATIONAL CORRESPONDENCE SCHOOLS Box 6123, SCRANTON, PA. Explain, without obligating me, how I can qualify for the posi- tion, or in the subject, before which*l mark X. (CD ELECTRICAL ENGINEER CHEMICAL ENGINEER Electrician SALESMANSHIP Electric Wiring ADVERTISING MAN Electric Lighting Window Trimmer Electric Car Running Show Card Writer Heavy Electric Traction Outdoor Sign Painter _ Electrical Draftsman RAILROADER Electric Machine Designer ILLUSTRATOR Telegraph Expert DESIGNER Practical Telephony BOOKKEEPER MECHANICAL ENGINERR Stenographer and Typist | Mechanical Draftsman Cert. Public Accountant Machine Shop Practice Railway Accountant Gas Engineer Commercial Law CIVIL ENGINEER GOOD ENGLISH Surveying and Mapping Common Schoo! Subjects (MINE FOREMAN OR ENGINEER CIVIL SERVICE _ Metall urgist or Prospector )Railway Mail Clerk pj STATIONARY ENGINEER Textile Overseer or Supt. TECT AGRICULTURE Spanish Architectural Draftsman Navigator German PLUMBING AND HEATING head Poultry Raising Freneh Sheet Metal Worker Automobiles Itallan Name Present Occupation Street and No. —_ City. State If name of Course you want is not in this list, write it below. 358 & It hi £ Age
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November, 1916 The Special License Station of John W. Hubbard, P Chester, N. Y., is shown by the accom) nyving illustration. Mr. Hub- successful in relay work mmunicate with 9LQ, 9PC, SNH, 8JZ, 1ZL, 1CW, and middle west and southern sta- bard ha being abl 8XA, 8YI many othe SZW tions. The receiving set was designed by the owner and was used in connection with a one-step amplifier. The sending outfit is a one Kw. Marconi set. Mr. Hubbard calls QST the best amateur wireless magazine published. Do you agree with him ? | Special License Station 2ZP —
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November, 1916 The Station of H. L. Stanley, 360 Babylon, L. I. This outfit is owned by one of the League members, Mr. H. L. Stanley, who has done considerable work in the relay line although he is hampered by certain directional ef- fects which are very prominent on Long Island. The photograph is clear enough to A 200 Cycle Generator and Synchronous Gap The accompanying illustration shows the transmitting outfit of R. A. Miller, Cal. The set consists of a 200 cycle A. C. generator run by a three horse power gas Ione, A synchronous gap is shown on the A half Kw. transformer with an air space the outfit. The feet high and two stranded wires eight feet engine. end of the generator shaft. condenser is 60 completes antenna apart. describe itself and we can offer few sug- gestions except to nqte that our old slogan has been followed by keeping the leads short in the oscillation circuit: Mr. Stan- ley has done everything he could to make the station efficient and easy to handle. With the set, 6RJ has had no difficulty in working 7ZH at LaGrande, Ore. (550 miles). He has also been heard by 7CM, Lacy, Wash. Mr. Miller says our magazine is certainly a live one. ar. QUT || | > = | >
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~ November, 1916 A Novel Loose Coupler This illustration shows a _ novel loose coupler which was designed and built by Roy Haynes of Chicago. One of the many good features is that it only takes up a square of eight and one-half inches on the operating table. Another element worth mentioning is the easy adjustment of the - secondary, which is counter-balanced very accurately so that a slight pressure will raise or lower it. The coupler was designed primarily for undamped wave reception. The primary is five and one-half inches in diameter and eight and one-half inches in length. The secondary is one-half inch smaller in diam- eter and the same length as the primary. This design insures very close coupling. Taps on the primary and secondary are Lo taken off in the usual manner allowing z variations of single turns on the primary and fifteen turns on the secondary. The y switches shown at the bottom are for dead- end and putting a variable across the sec- ap ondary. A Texas Station 361 * } 4 Description on following page
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November, 1916 The accompanying picture shows one of the outfits near the Texas border. The equipment is located at House, Texas, and owned by D. H. Graham. His antenna is made up of eight, seven strand wires spaced three feet apart. It is 70 feet long, leads being brought from each wire to a lightning switch and then into the station with a Packard stranded cable. The ground is composed of a No. 4 D. B. R. C. wire soldered to a pipe which leads from a seven by six foot tank which connects to a well 90 feet deep. The wire is ten feet long. Two receiving sets are shown in the photo, one being designed for waves up to 3,000 meters, using three Galena detec- tors and the other for 200 meter work, The Experimental Station of Raymond Smith, 8KL vo Electric al Exper menter The accompanying illustration shows the experimental station owned by Raymond Smith. The station call is 8KL. For transmitting, a one-half Kw. open core QST 362 using an audion, a one to one transformer, and an Audio Tron, a pair of Brandes 3200 ohm Navy phones and a pair of 2800 Trans- atlantic complete set. The power is taken from a 110 volt, 60 cycle self-excited gen- erator, driven by a gasoline engine. A. Packard % Kw. transformer, Marconi key, two banks of four sections of Murdock moulded condenser in series parallel, a rotary gap, Murdock oscillation transform- er, hot wire meter of Clapp-Eastham make, and a change-over switch, mounted on %- inch Bakelite complete the equipmen. This station is located on Trunk Line “E” and communicates with the No. 5 station, 5ED, on the same line. transformer with glass plate condenser, sta- tionary spark gap, and oscillation trans- former is used. The transformer is oper- ated in conjunction with an electrolytic in- © . £ = ‘
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363 QsT November, 1916 terrupter with a water rheostat control. switches. The daylight receiving range is The receiving set comprises receiving about fifteen hundred miles and the trans- tiansforn idion detector, variable con- mitter has already worked sixteen miles. denser, M < phones, and the necessary A League Station in Abington, Pa. This « pment is owned by C. W. Weber who ha een a member of The American Radio Re League for some time. The sending tfit comprised of a quarter Kw. Char open core transformer, four Murd lensers, Chambers rotary gap and o transformer. The antenna is 150 feet ng in a “V” shape only twenty feet his No difficulty has been experi- enced mmunicating 250 miles in the evenir Tt tation is in continual com- munication for relay work with 3WN, Mor- ristow N. J The receiving set is composed of a vario- meter tuner, designed by Mr. P. F. Godley, with a larger tuner for commercials and undamped waves. Last winter 9FY was heard with the phones on the table and 4AA was copied four nights in succession. He says he was using only 300 watts to com- municate 850 miles. This may convince some that long distance work does not al- ways require a high antenna. If anyone hears 3AF he will please notify by writ- ing C. W. Weber, Post Office Box 25, Abington, Pa. f ~
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November, 1916 QsT 364 The Contest Scores The next issue will contain the final scores and this is the last time that we will have for that Amateur-to-Amateur talk. The contest has grown wonderfully this month and some new entries have pushed to the head, proving once more the saying that the last shall be first. You have TWO WEEKS MORE for the final round-up. Help us as well as yourselves, boys. More subscribers means that OUR QST will be better. And the PRIZES—take one look at them fellows, then grit your teeth and start out again. No matter how hard you have worked, WORK HARDER. It isn’t too late yet to boost your name into the first five. If you are in the first five, you will have to push still harder to hold your place. Lets make this finish one grand glorious success, for both of us. QST to the front. CONTEST DEPT., Chas. A. Service, Jr., Bala, Pa. 249 Hodge Alexander, Grove City, Pa. 210 Charles Shanks, Maplewood, Mo. 152 Carl Linxweiler, Dayton, Ohio 147 Ralph Batcher, Ames, Ia. 132 F. F. Humphreys, New York, N. Y. 108 Joseph Morgan, Jr. Germantown, Pa. 96 H. R. Hick, Rocky Hill, Conn. 87 G. L. Hartman, Wauwatosa, Wis. 72 Albert O. Parmalee, Reading, Mass. 62 Phil H. Betts, Montclair, N. J. 60 Albert McKinley, Marion, Ohio 48 V. C. Mellvaine, Tampa, Fla. 47 Arthur Klaus, Eureka, III. 42 Robert Hill, St. Paul, Minn. 38 G. F. Tompkins, Hasbrouck Heights, N. J. 36 Earl Swain, Indianapolis, Ind. 30 Paul J. McGhee, Mattoon, Ill. 30 O. Hanger, Haledon, N. J. 24 H. H. Lewis, Cincinnati, Ohio 24 A. C. Spencer, Magnolia, I1! 24 E. C. Wiendrieck, Merrick, N. Y. 24 John Nightingale, Paterson, N. J. 24 R. N. Kingsbury, Ravenna, Ohio 24 Arthur Bragg; Evanston, IIl. 24 W. S. Louchheim, Jenkintown, Pa. 24 C. R. Pardridge, Saginaw, Mich. 21 Elwood Squires, Berkeley, Cal. — H. F. Corson, Newark, N. J. 17 M. H. Muhleman, New York, N. Y. 15 Robert Cushman, Brattleboro, Vt. 13 A. C. Young, Buffalo, N. Y. 12 Cedric E. Hart, Salt Lake City, Utah 12 James Hill, Jr., Evanstob, Il 12 S. Kruse, Lawrence, Kans. 12 H. B. Tyler, Hyde Park, Mass. 12 Warren J. Mayer, Elizabeth, N. J. HARTFORD, CONN., OCTOBER 18, 1916 Henry Cole, indianapolis, Ind. Albert Bousquet, Braintree, Mass. Adolph Stein, Jenkintown, Pa. Valentine Harrington, Milton, Mass. W. F. Justus, Columbus, Ohio. William Blum, Atlantic City, N. J. \shley Williams, Lincoln, Nebr. ‘Imer Miller, Los Angeles, Cal. Herbert Fuller, Chicago, Il. Gilbert R. Payson, Jr. Boston, Mass. H. W. Eaton, Winter Hill, Mass. G. W. Bonson, Dubuque, Ia. S. H. Besley, Salt Lake City, Utah. Norman Chilton, Westfield, N. J. E. L. Sypher, Jamaica, N. Y. H. C. Midgely, Tompkinsville, N. Y. E. R. Schwalter, Haven, Kans. J. G. Schroll, Oak Park, III. J. F. Teunisson, New Orleans, La. R. B. Parker, Hartford, Conn. G. W. Lielenthal, New York, N. Y. R. B. Watt, Stapleton, N. Y. W. A. Thompson, Roland Park, Md. Fred Caldeway, Jr., Cincinnati, Ohio. William Macke, New Orleans, La. Ellis C. Pattee, Beaumont, Tex. B. S. C. Southern, Brooklyn, N. Y. J. S. Woodruff, Elmhurst, N. Y. R. Hosmer, Chicago, III. V. H. Kansier, Reedsburg, Wis. R. W. Pratt, Portland, Me. W. O. Watkins, Birmingham, Ala. Raymond C. Murray, Chicago, IIl. J. W. Hager, New York, N. Y. E. E. Rose, Detroit, Mich. E. J. Grieb, Springfield, Ohio. | ~ Ik. 3 Se _
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QST November, 1916 QS T SUBSCRIPTION CONTEST Many of the most promising amateurs are held back for the want of money to buy first class apparatus. We have worked out a plan for helping these fellows. We have arranged for twenty different pieces of the latest wireless equipment and all of it is to be distributed among those amateurs who are willing to put in a little work for QST. The one who sends in the most subscriptions to QST before November 18, 1916, receives the first prize, a $25 DeForest Audion Detector of the latest type. The one who sends in the second highest number of subscriptions to QST receives a second prize, a pair of Brandes Navy Telephones. The third, fourth and so on up to the twentieth, re- ceives apparatus as stated in the list below. The conditions governing the contest are simple. They are:— 1. You must send in your name and address, and we will send you a quantity of subscription blanks. Your subscriptions must be made out on these blanks, and sent in to Contest Department, Ameri- can Radio Relay League, Hartford, Conn. Any one interested in wireless is eligible. 3. To be entitled to any of the first five prizes one must send in a minimum of 20 yearly subscriptions or their equivalent. To be entitled to any of the last 15 prizes one must send in a minimum of 10 yearly subscriptions or their equivalent. |. Weekly reports must be sent in beginning August 12th. The score will be printed in QST each month, so you can see how you stand with the other fellows. 5. Part time subscriptions are counted proportion- ately. For example, a full year subscription counts 12. Six months subscription counts 6, a three months counts 3. If you buy copies and sell them, they also count as one each. Remember, the most unexpected people are interested in amateur wireless, and will gladly subscribe if you ask them. Your family doctor, sometimes is crazy to know about the extent to which wireless is practiced. We know one ourselves. The grown-ups are the best kind of material, because not only are they interested themselves, but their children might be made to take an interest from reading QST, and moreover, the grown-ups always have the cash. THE AMERICAN RADIO RELAY LEAGUE, INC. Subscription Contest Department. ~ . 365 |
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November, 1916 Qs FOR SAL FOR SALE—Condensers, tuning coils, keys, transformers, phones, and transformer cores. Write for what you need and prices. Al. R. Leavitt, 13 Grant St., Natick, Mass. FOR EXCHANGE—One Murdock receiver, 1,000 ohms, and one Murdock No. 364 variable condenser; want audion type T bulb, or what have you in exchange? Laurence P. Harsch, Box 110, Mt. Rainier, Ind. EXCHANGE—Have 4”x5” Blair focusing box camera (plate). Fine double anis- tigmat lens, revolving diaphragm. Time and instant shutter. Horizontal and ver- tical finders and tripod attachment. Cost $35.00 new. Good condition; want type- writer. State make and condition. All letters answered. E. S. Washburn, 302 Orange PIl., Plainfield, N. J. FOR SALE—Type H-I, % Kw. 10,000 volt Thordarson transformer; good condition; new secondary, $9.00. W. J. King, Woodville, Mass. FOR SALE—Bunnell two-inch spark coil, slightly used. $5.00 takes it. Edgar L. Sypher, Jr., 224 Globe Ave., Jamaica, N. EXCHANGE—Erector for two variable con- densers or inch and one-half spark coil printing press, for Helix or what have you? W. Schmitt, 784 Macon Street, Brooklyn, N. Y. FOR SALE—One step-down transformer; has both binding post and switch vari- ations; 110 v. a. ¢. Price $2.50. An Amco Junior loose coupler in very good condition, price $2.50. John Dow, 20 Woburn St., Reading, Mass. FOR SALE—Arlington transformer, $5.00 WANTED—Small wireless receiving set in EXCHANGE (receiving), antenna switch, $1.00, wire- less key, 75c., one-half inch spark coil, $1.00, Mignon RC2, $10.00, battery am- meter, 50c. new. All letters answered. Walter A. Meyer, 1832 No. 13th St., Sheboygan, Wis. exchange for other goods. Write for list. Wm. Greenough, Palms, Cal. EXCHANGE—A FOR SALE—Spark coil transmitting set FOR SALE OR EXCHANGE—Two wall new Premo Junior No. 1 camera; takes 244"x34” clear pictures. Cost $2.00. An Electro Importing Com- pany’s antenna series condenser on good condition; a new combination slide and moving picture machine, cost $4.50. All these articles are in fine condition and cost me $8.50. I will trade them for a pair of Brandes Transatlantic or Navy Type phones, or a Multi-Audi-Fone am- plifier. Edmund Howlett, 19 N. Maple Ave., Ridgewood, N. J. consisting of coil and condenser in oak case with helix and gap mounted on top. Coil is built for radio work. Set has transmitted thirty-five miles. Price $6.00. M. A. Herzog, 16 Faith Ave., Atlanta, Ga. telephones complete with generators, $5.00 each. A few automatic telephone switches and a few complete ringers, 75e. each; other numerous articles cheap. Radio apparatus, loose coupler, detector, high frequency apparatus, etc. Want, commercial key, Boston preferred, audi- on, burned out Audio Tron bulb, type- writer, or what have you? Joe L. Smith, 901 Fourth St., Garden City, Kans. | 4 } | . | -
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367 Q WANTED I will pay fifteen cents QST. for July QST in good condition. Robert W. Cushman, Guilford St., Brattleboro, Vt. WANTED—A 20 ampere hot wire am- meter; must be in good condition and read perfectly. All letters answered. Thomas A. McCann, 115 N. Perry St., Dayton, Ol FOR SALE—'! H. P. Emerson motor, start r ishes, runs as_ induction motor. Supplied complete with 3 speed pulley; $6.00 takes it. Herbert L. Laube, 315 Grace St., Dubuque, Ia. FOR SALE—Packard % Kw. transformer, $7.00; urge Adams-Morgan variable, $5.00; Mes 4 inch spark coil, $10.00; pair H r-Cabot phones, cost $8.60, sell $4 DeForest audion set, cost $18.0 $12.00; Blitzen $33 receiving set, consisting of Clapp-Eastham vario- meter, Clapp-Eastham variable, Crystaloi detect er, push button and pair Brand: Superior phones, complete set Amplifier bulb, suitable for re- newal, $5.00. James E. Johnston, 1379 Clay A Bronx, N. Y. WIRELESS FOR SALE—One Kw. Clapp- Eastham Co., transmitter complete, in per- fect lition, nearly new; transmitting rangé 0 to 900 miles; has’ U. S. Gov. licer ficial call (5ZH); first check for $125 takes it. W. O. Horner, Jeweler. Cleveland, Tenn. ATTENTION—Will pay $1.25 for a com- plete f QST from Volume 1, No. 1 to \ me 1, No. 9. Must be.in good \ddress Harry Krug, 6906 Pittsburgh, Pa. E. E. cond = ryar St... FOR SALE—Wm. B. Duck Company’s ap- paratus consisting of $2.00 tuning coil; $3.00, 1,000 ohm phone head band and receiver block; 30c. switch; 60¢. fixed condenser; all com- cord: 20 detector; 50c. plete mounted on hard-wood base, $5.00. Hollis L. Gray, 29 Vine St., Medford, Mass. T November, 1916 FOR SALE—Colby’s receiving transformer, great for amateur waves, $3.25; Amco type rotary gap, $3.25; Murdock 2800 meter loading coil, $1.25; Pancake type oscillation transformer, $1.50; .01 m. f. transmitting condenser in rack, $2.25; also have some tuners, fixed condensers, detectors, phones, switch boards, receiv- ing cabinets, etc. Write for prices and particulars. Carrollton Radio Laboratory, 214 Maple Ave., Carrollton, II. FOR SALE—1 RJ4 DeForest audion, with new bulb and batteries, $16.00; with old bulb and less batteries, $10.00; with slightly used bulb $15.00. M. H. Pan- cost, R. F. D. No. 6, Lansing, Mich. STOP—LOOK—LISTEN — Will exchange large Navy type coupler in good condi- tion, with hard-rubber front, worth $15.00 for a five dollar bill and a two dollar bill— CASH—and for immediate sale. Write or call 3Nr to Gilbert E. Maul, Chatham, New Jersey. FOR SALE OR EXCHANGE—Two pairs of Brandes oscillation induc- tances; 1 oscillation transformer; 1” Mesco coil. or amplifier phones or Brandes phones, or QRU. Lilienthal, 64 Beekman St., New York, N. Y. Superior; 7 large commercial I want cash Navy Type George W. WANTED—At once, a set of QST, Vol 1, numbers 1 to 8 inclusive. Will allow premium. State price and _ condition. Chas. Steiner, 523 West 113th St., New York, N. Y. WANTED — Variables; have good set of phones or will pay cash; must be in good condition. Wm. F. Justus, 273 So. Mon- roe Ave., Columbus, Ohio’ Murdock variable; 2,00 ohm Brandes phones; Audion Tron detector cabinet with bulb and batteries; 150 ohm Bun- nell railroad relay; 5,000 meter Navy loose coupler, on fibre panel. Want Blitzen key, Blitzen variables, on aerial siwtch. A. A. Kluge, 1227 S. St., Lin- coln, Neb. | | FOR SALE OR EXCHANGE—One small
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QST ADVERTISERS This will not be the first time we have called attention to the advertisements which appear in QST. This issue shows again an improvement over previous issues from the advertising standpoint. More space is tak- en and the highest quality of radio goods is shown. There is one element about a QST advertisement which some of us may never have considered. When an advertiser puts his name in our magazine, he has the approval and guarantee of the whole ama- teur wireless field. We can safely say that QST is the only place which can give him this. In other words, the advertiser gets more than mere returns; he gets us with him, back of him, and for him here. We ama- teurs know this manufacturer or that manu- facturer is up to the standard. We know ALWAYS MENTIO the goods he advertises. His methods are methods of which we approve. His appar- atus is of the highest standard. We sup- port the advertisers and the advertisers support our magazine. A mutual feeling has become firmly established, which can be found nowhere else. The advertiser looks on our magazine in the light of a place where he can get with the amateurs, understand their wants, and give co-opera- tion. We are the ones who make his busi- ness and he feels that our magazine is a thing for him as well as us. He feels he must advertise to help those who help him. So remember, always, we must show him our appreciation by always acknowl- edging his QST support whenever we write to him. QST when writing to advertisers ADVERTISERS when writing to QST Amateurs obtain results by using W. & S. Instruments Our goods are sold with a guarantee. Tell us your needs and we will furnish you estimates. If you are a beginner, we will be glad to furnish plans for your station FREE OF CHARGE. Agents for ELECTRON RELAY, BRANDES’ PHONES, MULTI-AUDI-FONE CLAPP-EASTHAM and MURDOCK APPARATUS Wilson & Smith Wireless Mfg. Co. 508 Walnut St. Kalamazoo, Mich. GERMANY--- ON AN 80 FT. AERIAL You ean read ““POZ"’ (Nauen) and “OUI” (Hano- ‘r) daily on our 80 ft. aerial with this MARVEL OF EFFICIENCY and SIMPLICITY PRICE 50 per cent. LOWER than others Send 2c. stamp for Bulletin No. l06A Radio Apparatus Co. of America Parkway Building, Philadelphia ~ 4 | R34S UNDAMPED PANEL RECEIVER ; i
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Has an Illustration of Your Station Appeared in QST ??? HAS QST A PHOTO OF YOUR WIRELESS If it has, you are im luck. You can buy the half-tone and do what a great many amateurs have begun. The scheme is to print a photo on your stationery from the engraving. Then, when you write to a fellow-amateur, he can see just what your station looks like and all about it. It is a fine scheme and to help it we shall place on sale—for the owners—half-tones of stations which appear in QST. These cost us from a minimum of $1.25 up to $2.50. We shall sell each one, regardless of size, for $1.00. This gives you a chance to save some money and get in on a dandy idea. If your station has enjoyed the honor write today; just enclose a dollar, ask for your half- tone, and it will be sent post-paid by return mail. ADDRESS : ILLUSTRATION DEPARTMENT American Radio Relay League, Hartford, Connecticut = LEARN WIRELESS “SEE THE WORLD AND GET PAID FOR DOING IT.” BRANDES ‘The Largest, We E> Best Equip- RADIO HEADSETS Guarantee pedandONLY } First Grade Practical Superior Type, $5.50 poy Radio School ; > > > ENDORSED BY GOVT. AND MARCONI OFFICIALS } Last year EVERY ONE of our graduates were placed in good positions; operating in all parts of the worid, and still we are unable to fill the demand for them. We strongly urge you to join one of our Day or Evening classes if you wish to} Made for Long Distance Reading s 4 aie take advantage of the big demand for our Graduates. t Send 4c in stamps for our new catalog F Send stamp for New Fall prospectus which contains » | select wireless apparatus detailed information and other useful data. t > C. BRANDES, Inc. —— cal Eastern Radio Institute nion Squarc, Reom 821 899 E. Boylston St. ; NEW YORK BOSTON - MASS. p | STATION ? ST | a m7 \\_ AAS
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Paragon Instruments Have Set New Standards They are in a distinct class by themselves. There are no other instruments which can EQUAL THEM regardless of price. WE CAN PROVE THIS ASSERTION TO THE SATISFACTION NYONE. THIS INSTRUMENT IS SUPER-EFFICIENT, SUPER-SELECTIVE AND SUPER-SENSITIVE. It was designed especially and solely for reception of AMATEUR WAVE LENGTHS and its development has been carried on over a period of two years. It was the first and is the only worthy adaptation of the Regenerative circuits to short wave reception. The antenna inductance is arranged in steps. ASIDE FROM THIS THERE ARE NO SWITCHES. Con- tinuously variable inductances— carefully designed variometers— are used in the closed circuits. HIGH RESISTANCE CON- TACTS, the capacity of switch points and leads, end-turn losses and the necessity for a variable tuning capacity are thus EN- TIRELY DONE AWAY WITH. Sntenna and R. A—6—PARAGON AMPLIFYING SHORT WAVE RECEIVER, $35.00 COUPLED, and the COUPL- Range 180 to 580 Meters ING IS VARIABLE. The com- . ponent parts of the instrument are not crowded into a small cabinet. The fact that ALL of these things are of extreme importance has been proven by the here-to-fore unheard of SELECTIVELY and AMPLIFICATION obtained by owners of this instrument. Signals may be read from stations at extreme distances or through heavy static and interference with this instrument long after other receivers have failed and WEAK SIGNALS MAY BE AMPLIFIED UP TO ONE HUNDRED TIMES USING ONE AUDION ONLY. We would be g'ad to furnish the names of prominent members of the American Radio Relay League who have offered unsolicited testimony as to the operation of the R. A.—6—, the amplifica- tion obtainable, and the distances covered both day and night. PARAGON WIDE RANGE RECEIVING TRANSFORMERS The methods employed in winding the coils eliminate leakage due to coloring matter in the insulation, put an end to the presence of moisture in the varnish, insulation and tube. The coils of the Paragon “‘No-End-Loss” transformers are divided into sections and fitted with self cleaning, positive action end turn switches which connect and disconnect the winding as required, entirely cutting off from the circuit unused portions of the in- ductance and completely eliminating end turn effects on all wave lengths. These switches are enclosed and are automatically controlled by the primary and second- ary inductance switches re- spectively. Panels, housings, switch heads, etc., are of polished black FORMICA, which is superior in every way to hard rubber and costs more. All metal parts are of gold lacquered brass. These in- struments are adapted to ‘tremely close tuning and lue to the absence of end- osses are particularly re- commended as the only re- ceiving transformers on the PARAGON RECEIVING TRANSFORMER TYPE “L” $22.50 TYPE “S” $30.00 TYPE “X” $35.00 market suited to the recep- tion of amateur wave- lengths or for use in conjunction with the AUDION DETECTOR, SEND STAMP TODAY FOR BULLETIN “O”" WHICH DESCRIBES A VARIETY OF ENTIRELY NEW TRANSMITTING AND RECEIVING SPECIALTIES OF PARTICULAR INTEREST TO THOSE WHO DESIRE THE BEST. SEND 6c. FOR OUR 232 pp. CATALOG Our No. 7 Catalog shows several hundred different parts and also sets of materials for building your own apparatus. We do all the difficult work in our factory and give you the benefit of machinery and equipment Contains complete description and prices of all the latest Wireless and Electrical Goods. OUR PRICES WILL SAVE YOU MONEY AND OUR PROMPT DELIVER- IES WILL SAVE YOU TIME. THE BEST CATALOG OF ITS KIND IN AMERICA Adams-Morgan Co., Upper Montclair, N. J. Always Mention “QST” When Writing to Advertisers = “a ye al | | iit 3 = > 4 |
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Dee. 1, 1916 Special Introductory Offer Dec 1, 1916 al | AUDIOTRON 15000M ULTRA LOOSE COUPLER | REGULAR PRICE $37.50 RECEIVE OUI, POZ, NBA, NAA, WGG, WSL, KET, KIE on the AUDIOTRON ULTRA The only coupler designed along approved commercial lines for the efficient reception of long wave signals, from 2000 M up to 15000 M, without loading. Transfers maximum energy to the secondary and detector circuits. Primary and secondary wound on lathe cut fibre tubes. No enameled wire used. Secondary end, runner support and primary switch panel of genuine hard rubber. Navy type switches —self cleaning type. Extra large knots. 32 contacts on primary. 16 contacts on secondary. All metal parts polished nickel. Secondary carried on two guide rods with metal bearings entire length of secondary. Primary and secondary windings covered with black celluloid. Gives a rich, attractive finish. Mounted on handsome base of quarter sawed oak. Length over all 36 inches. Primary 9 inches diameter. OUR SPECIAL LIMITED OFFER:—To introduce this coupler we will ship all orders mailed before December Ist at the special price of $32.5 $2.50 and will deliver it free at your door when cash accompanies order. Safe arrival and satisfaction is guaranteed. Compare this ‘ offer with what others give and your choice must be an AudioTron Ultra—as offering Ultra Value. Order To-Day and Insure Prompt Delivery. SEND FOR FREE CATALOG—MOST COMPLETE LINE OF COUPLERS—6 TYPES $1.00 UP AUDIOTRON SALES COMPANY 315 LICK BLDG., SAN FRANCISCO, CALIF. mw ww | | A it “J | wwe
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Multi- Audi-Fone You don’t know what Wireless Signals are until you have heard a Two Step M. A. F. Price, $75.00 If you have ever used a M. A. F. you will never be without one. Price, $18.00 Do you want® to; hear those foreign undamped stations? The undamped waver will get them for you. PRICE, $100.00 M. A. F. Detector Stand $4.25 xs Fixed Condenser 2.00 | Detectorfone 35.00 | SEND FOR NEW CIRCULAR | 275 MORRIS AVE., ELIZABETH, N. J. | “| Always Mention “QST” When Writing to Advertisers . | | | a | | | | if
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ARE YOU PREPARED for the long winter evenings? Now is the time You will need some of our Better send for our to fit up your station. parts and raw materials. CATALOG E at once. No. 6261-4 x 3-8 inches, tapped 6-32 Doz. 0.30 50 $1.00 100 $1.75 No. 627-1-4x1-4 “ 1-2 in. shank threaded 6-32 “ .36 ” 1.25 sa 2.00 No. 628 “ tapped 6-32 .90 1.50 Prices are for plain brass finish. Nickeled points furnished at 50 per cent. advance over above. * THERE'S MONEY INIT” ‘LEARN TELEGRAPH he ~— MORSE AND WIR FLESS-— — -AT- - —HOME - —— nereasing. Postage on 50 or less, 4c. Maguire@ Shotton 814 Lancaster Street Albany You May Learn Theory, Code and Laws of Radio Communication in Our School or at Your Home, you for positions paying good sala- vderful chance to trarel the ' It's the most interesting pro- nown and the demand for skilled . d stamp for which gives full information. NAT RADIO SCHOOL, 1405 U St Washington, D. C. Always Mention “QS T” SWITCH POINTS On 100, postage on 1 |b BANY New York TEACH YOURSELF 'n half usual time, at trifling cost, with the wonderful Au- tomatic Transmitter, THE OMNIGRAPH, Sends in- limited Morse or Continental messages, at any speed. just as an expert operator would, Adopted by U. S. Gov't. 4 Styles. Catalog Free Omnigraph Mfg. Co. 35-39 Cortlandt St. New York EARN TELEGRAPH Mor<e and Wireie-s—R. R. Accounting (Sta tion Agency) taugit. Splendid opportunitics. Positions secured. Marconi Co. contracts to em- pi oy graduate 8. We two le arge modern buildings equipped w J on wires and complete 2K ‘ Wi re lowe Larres stab 17 ‘Railroad, ‘Me vend tern Union prectical teachers. ng xpanece: ea sired tion low. y ® Corres, nde n Catalogs Free, Doc'se’s Telegraph, Ry.& Wireless Institute RADIO Street. Valparaiso, ind, vwnand exclusive ney Ww When Writing to Advertisers Fy a \ = | — |
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IT TELLS YOU HOW TO lEvervaay BUILD YOUR OWN APPARATUS Everyday Mechanics is the first and only magazine in the world devoted exclusively to constructional ‘‘how-to- make and how-to-do”’ material. It is edited by Thomas Stanley Curtis, whose articles and work you have known since the old days of ELECTRICIAN AND MECHANIC. It con- tains no war pictures, free write-ups of new devices, general news features. Itissolidly and consistently filled, to the last of its ninety-six pages, with practical how-to-make and how-to- do articles. EVERY FEATURE article that appears in the magazine is prepared from the data ob- tained in the actual construction and operation of the apparatus described. For every arti- cle, a model is constructed in the EVERYDAY MECHANICS EXPERIMENT STATION, Van Nest, N. Y., where it is given a practical working test. This means reliabilty and sat- jsfaction. EVERY NEW SCIENTIFIC discovery and achievement will be worked out in amateur form in the Experiment Station for the benefit of the readers of EVERYDAY MECHANCS in the future. A model showing the working principles will be described in detail in the magazine so that the serious experimenters of the country may strive to emulate the work done in the experiment station. THIS MODEL SUBMARINE, CONTROLLED BY WIRELESS; has been described in past issues. The mode} is § ft. long; it is propelled by electric motor; it turns, dives, rises and fires a torpedo which explodes after leaving the boat, all at the will of the wireless operator on shore. Other models, just as am- bitious, are in process of design. OTHER FEATURES have been the construction of high frequency apparatus to give gigantic sparks, trans-atlantic radio receiving apparatus, kicking coil apy aratus, plant culture paraphernalia, and countless other articles that have delighted the hearts of the serious- minded experimenters of the country and have caused nearly 4000 of them to voluntarily write that EVERY- DAY MECHANICS is the best practical magazine bar none, that has ever been published. We want you to see and read EVERYDAY MECHANICS because we know you will need it and enjoy it. The subscription price is now 50 cents a year, but this is going to increase with the October is- sue to $1.00. The news-stand price will then be 10 cents. A dollar bill pinned to the coupon brings you EV- ERYDAY for two years ifsent NOW. EVERYDAY MECHANICS CO., INC., 848 Aeolian Bldg., New York Please book me for a subscription for EVERYDAY MECHANICS for years, at fifty certs per year. I enclose $ to pay for same. My Name is = My Address Always Mention “QST” When Writing to Advertisers q qi a 7 | | | i | | .| | bal, € & 4 We
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4 4 4 4 4 4 New Undamped Wave Coupler, No. 749 Special Introductory Price, $18.00 Our new Coupler No. 749 is 32 in. long, : 9 in, wide and 10 in. high over all, and on the } average sized antenna tunes up to 15,000 meters. This Coupler, used with the new CHAMBERS’ SYSTEM OR CIRCUIT will bring in signals from domestic and foreign Are Stations surprisingly loud and clear. Note the difference in size of our No. 748 and the new No. 749. We claim to be the original inven ors of a SYSTEM or CIRCUIT, for the reception of the undamped waves without the use of Load- ing Coils or Oscillating Coils, as they are sometimes called; as with our system or circuit only two inductively coupled coils are necess- ary. Circuit supplied with each coupler. This CHAMBERS’ CIRCUIT saves you money. Think of it! No extra coils to pay for, and price of coupler only $18.00. ‘lace order now so as to be in on the introductory price. Orders filled in rotation. Send for descriptive matter. F. B. CHAMBERS & CO. Philadelphia, Penseplvanie AAA Announcing the DeForest Tubular ; Audion Bulb “There is only oneAudion-the De Forest” Canton, Ohio : ay = Always Mention “QST” When Writing to Advertisers > > 4 The Ne Tubular Audion Bulb gives 4 very loud s from powerfu! stations. It has t a large s| plate, a spiral grid and only > one hlam ngsten. As this is a long } , straigh ament, it has a long life. Edi- | 4 son effects mp etely eliminated The plate 4 > =n nta the heavy glass tube, pre- > > venting ov eating , t Sold Separately, $5.50 each > The special adapter fits this type to the screw , base rece es of De Forest apparatus, and is 4 furnished at 4 ents extra, 4 4 > Send stamp for Bulletins DI6 | and B16 ° 4 | The Wireless Mfg. Co. , 4 > 4 > | 4 ly | 4 T %
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HAWKINS help you succeed through electricity These books will answer every one of your electrical problems. written so that you can understand them. tricity your fingers ends Know the facts in Electricity. They count—and mean more money and better position for you. You need the exact information, —in a practical form so that you can use it every day, to help you install electrical equipment, or make repairs, or operate machines, or dowhatever else your present job —or the job ahead of you—calls for. GUIDE They are Arranged in the form of questions you would ask—and the answers to them — in plain, practical, everyday language, clear, concise and to the point. Thousands of men are using Hawkins Electrica Guides as a practical aid to greater success in the electrical field. Read what users Say: | “Every Electrician, Operating Engineer or Student who wants to advance himself in the Electrical field should have a set of these books.” JOHN KELLEY, 116 Union St., Newark, Ohio. “ For the man not getting a college training, and even in that case, I ean sincerely say I do not believe there is a better set of books on Lioyp LD. HUFFMAN, Dayton, Ohio. the market today.” *We consider Hawkins Electrical Guides the m« ost compact and complete set of electrical references in the market. NOGGLE ELectric Works, Monterey, Cal. Specially Arranged for Home Study and Reference They are bound in flexible covers that make them a pleasure to handle or have in your library. Size 5x6's inches and to inches thick. You can carry each separate volume about wi th you until you have mast 1 its contents. Hawkins E] lectri cal Geides fit your pocl et and your pock<t book |. Only $1 per volume and ow rs of the set say there are no better electrical books at any price. PARTIAL CONTENTS »tism—Induction— Experiments — Dynamos 1. inery—Motors— Armatures— Arm met tT Practical Management nd Motor Distrivution Systems— Wi r Diagrams—Sign F lashers—Stor- eric rs “Pris ples of Alternating Currents A t ating Curren ct rs—Alternat- ste me—Cireuit Breake ere—Measur- s—Switch Boards—Wiring—Power altir Telephone — Telegraph — tells Lighting — Railways Also many ern Practical Ap of Plectricity Ready Kefere of the 10 numbers. “I think they should be in the bands of everyone who has anything to do with Electricity. T. E. Murpny, Orange, Va, “For the practical electrician, they she best books published —worth many times their price.’ . WAGNER, Wyoming, Il * I have gained valuable information naa them which has helped me directly in my line of work.” HERMAN NODENBSERG, Hoboken, N. J. “They are wonderful value. Everything is so clear and concise. Even one who had no knowledge of Electricity would have no diffi- cans in grasping the facts. F. L. TayiLor, Amesbury, Masa, ‘It isthe best work an apprentice can study if he wants to get ahead in hie trade. Asa reference for the experie enced worker Hawkins Electrical Guides are unexcelled.” L MCCLELLAN, Chillicothe, Mo, 10 Practical Volumes— 3500 Pages — 4700 Illustrations $1 A Volume—S$1 A Month These books are a complete and up-to-date course in Electrical Engineering—the standard works on Electrical Science. Contain no useless matter —only such information as is needed. py Shi pped to You FREE Send no money. Ex: amine the books first. Decide if Please submit m 7 r ex for yourself that they are the most complete and clearest aminatio Hawkins Electrical shed. Every book tisthe best offer now— prepa ed, 10 numbers if eatisfact: wry ee to send you $1 seven dave and to mail you $1 each month until paid QST 11-16 } ‘ 4 4 a | al = a RS ig if to keep the books you can settlement at only §1 per month, until paid for. € ~ Theo. Aude! & Co. S = 2
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¥ REMEMBER-- that while our new catalog X is filled with complete radio instru- ments of the highest order of ex- cellence. we also carry a complete stock of exceptionally fine electrical fittings, such as switch points, in- strument switches, wire (bare, in- sulated and resistance) dead-end switches, ete. listed in our general catalog. We will gladly mail both books for which we ask the courtesy of 6c in stamps. " rYPE X TUNER TUNER of conventional type with many exclusive features for wave \ wths up to 3000 meters. Primary dead end switch, plain ‘‘units” switch, mahogany and Bakelite throughout, rubber covered binding Complete description in our new catalog X. 4 140 Main St. Cambridge, Mass. GREBE RADIO APPARATUS EFFICIENCY BY EXPERTS R THE SELECTIVITY DISCRIMINATING SIMPLICITY = AMATEUR SERVICE = 3 SHORT WAVE REGENERATIVE*RECEIVER. TYPE AGP 101 a Our new type AGP 101 Short Wave Regenerative Receiver is specially designed for long 2 distance relay work on wave lengths of 150 to 400 metres. It embodies all the latest } PRACTI \L » ide as in regenerative receiver construction which have proven most satis- = far ial operation at our testing station. Designed primarily for short wave re- 2 Ce] his instrument will also operate very effic iently on wave lengths up to 1000) \ blueprint of connections and instructions for operating in conjunction with = - yo lion equipment is supplied with each instrument. 2 % SHORT WAVE REGENERATIVE RECEIVER, TYPE AGP 101, $32.50 é Send 2c Stamp for Catalog ““R"’ A. H. GREBE & CO. 10 Van Wyck Ave., Richmond Hill, N. Y. Always Mention “QS T” When Writing to Advertisers = — | = y A |
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The New Turney Receivers TAKE A GOOD LOOK AT THIS HEAD SET IT IS SURELY PERFECTION By looking at the cut you can almost feel the real comfort this set affords DESCRIPTION—This new Head set has all the good points you have been wanting, thinking about and trying to get. It hasa full complement ad- justments without removing from the head. They wound to 2000 chms, positive friction ments which stay put. Bakelite ear caps, German Silver top band, lenient back check, consequent poles and like all Turney apparatus is extremely hand- some in appearance. The adjustable pressure head band affords real comfort, a no matter how long you wear it. A circular giving complete information will be ; sent for the asking. NOTICE—All Turney head sets will be provided with the lenient back check which consists of a special woven canvas strap which fits the head perfectly. Eugene T. Turney Company, Inc., 2595 Third Avenue, New York City The R B D 8 is the last word in Radio Signal Detec- tors, equipped with the fa- mous Electron Audio Bulb. (All bulbs sold by us are manufactured specially for the Mignon System by the Electron Manufacturing Com- pany) and is wired accord- ing to the Circuit Specifica- tion of the Mignon Undamped Wave System, including the Auto-Transformer encircling the bulb. The R B D 8 is the most efficient Detector manu- factured and than doubles the efficiency of any Radio Receiving Station. This cabinet contains, 12 3-cell R BD 8 Size 12X12X9 inches. flashlight batteries, con- trolled by our nine terminal SILENT switch, one small fixed condenser, one 2 M. F. fixed condenser and one 43-plate rotary variable condenser. Duplex Rheostat for minute adjustment of Filament current by two 1li-terminal switches and six Terminal Posts for the connections of Telephones, a Six Volt battery and Tuner. In addition to these are five more posts, the latter to be used only when in conjunction with the Mignon Undamped Wave System. A marvel of efficiency. RECEIVING SET AS ILLUSTRATED TYPE R BD 8 $35.00 We are Central Representatives of De Forest Radio Te!. & Tel. Co. Mignon Wireless Corporation. Pacific Laboratories Sales Dept. Send 2c. Stamp for Catalog Wm. G. Finch Company Second National Bank Bldg., Cincinnati, Ohio Always Mention “QS T” When Writing to Advertisers \ Paty 2
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“THERE IS ONLY ONE AUDION, THE Dé FOREST” DE FOREST ULTRAUDION DETECTOR FOR DAMPED AND UNDAMPED WAVES The new DeForest Ultraudion Detector enables every operator to receive both spark and arc signals at minimum expense. This in- strument is made for private or amateur use only, and is within the means of all. Hereto- fore the lowest priced genuine Ultraudion cost $110.00. We now offer the new amateur type at £27.50. It is equipped with potentiometer control for the “B” or high voltage circuit, ar- ranged for external batteries to be furnished y the purchaser, has an internal rheostat like our higher priced instruments, and is equipped with the genuine DeForest Tubular Audion with adapter. TYPE UJI DeForest Ultraudion Detector No complicated circuits for tuning are Price, $27.50 necessary or desirable. Simply a regular tuner of proper size is used. No need of spending vey on large, expensive coils to receive Darien, Nauen, Eilvese and all the undamped sstations. The genuine DeForest Tubular Audion illustrated here- v within the means of all amateur operators. It is anyone in any quantity without the return of the old Fully 50 percent. more sensitive than any other known tector and thoroughly reliable. Tests show an op- ng life of at least 800 burning hours when properly used, st least a year’s service. With it the maximum receiving range can be covered. tor receiving arc and spark signals and also for am- Each equipped with a static shunt to prevent par- - ee Genuine DeForest Tubular Audion Price, $5.50, delivered you in perfect condition. Adapter, 40c extra ACCEPT NO INFRINGING IMITATIONS. INSIST ON THE GENUINE ARTICLE ym static and loud signals. Guaranteed to be de- Send stamp for Bulletins R16 on the Audion Detectors, Audion Receiving Sets the Tubular Audion and the Ultraudion Ww ARNING—Yo yu are entitled to the genuine Audion, guaranteed by the owners of the Audion when making an investment of this kind. Any evacuated detector having a filament, and a plate, as well as other types, are covered by our patents, and several! irrespon- fringers are being prosecuted. To be safe and get full value for your money, insist the genuine DeForest Audion.” DeForest Radio Telephone & Telegraph Company 101 PARK AVENUE New York, N. Y. Makers of the Highest Grade Receiving Equipment in the World Always Mention “QS T” When Writing to Advertisers 4 | oth J ne 4 — 4 | er » >| ‘ | | |
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Gee! Hello, Boys! Surprise your friends with yourknow- ledge of electricity, and ability to do more than a hundred in- tensely interesting electrical exper- iments that will open their eyes with wonder. Get how to build your motor, make magnets, wire door bells and electric lirhts, Gilbert’s ERECTOR Electrical Set With this marvelous new toy, you be able to build your own motor will operate forward and back- and control its speed so that you may operate perfectly your Erector models, mechanical toys, electric trains, wonderful, big book containing elementary course in electricity, comes with each set, will show construct switches, and do than 100 mystifying electrical experiments, You'll have the finest kind of fun! knows but that you may have great talent and that by playing with set, you will be encouraged to Erector Toy Engineering make a thorough study of electricity and become famous as a man, like Edison, Marconi, Volta, Tezla, Stein- metz! Ask your dealer today to show you the wonderful Erector Electrical Set. Price, $5.00 Canada, $7.50 Mail back the coupon for my hand- some book which tells all about my new, big idea—The Gilbert Institute of Erector Engineering, how you can wet free membership in it. and win diplomas, honors and valuable prizes. Starter. cord and plug attached, $5.00. Canada, de GET THESE ERECTOR ELECTRICAL ACCESSORIES 60--ERECTOR TRANSFORMER For alternating current only, 110 volt, cycle. Delivers either 4, 8 or 12 open circuit. Keeps cooler than other. Hich grade insulation pre- shock. Five ft. cord and plug, ached, $3.00. Canada, $4.50. ERECTOR MOTOR —Hither al- steel base. Current :—-Battery. Tubular ternating or direct 110 volt house cur- b Self-lubricating—easily replaced. Th an da volts, | rent = Self Well Always Mention “QST” When Writing to Advertisers a3,
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In Clear, Cold Winter Air SWITCH POINTS and LATHE WORK for . . WIRELESS. Switch points made only of or in Static Charged brass, highly polished, lacquered, and guar- Atmosphere of July anteed to stay bright. Size 1-4 x 1-4 in, or smaller, $.03 each. Prices for larger sizes on application. All switch points tapped for 4-36 machine screws which are fur- nished with the points. You get the same clear, velvety tone when you use the ats Lathe work, bushiags, loose coupler parts, rotnry discs, etc. at moderate prices. WRITE FOR INFORMATION EDW. M. SARGENT, 2235 Lake St. San Francisco Radio Phones and don’t forget the comfort. They fit perfectly, and weigh but 10 1-2ounces. SEND EOR LATEST BOOKLET 1687Q. BRANDES RECEIVERS MURDOCK, DEFOREST AUDION, CLAPP- EASTHAM GOODS PACKARD TRANSFORMERS WIRELESS EXPERT IN CHARGE. Hotz erCaBot ELECT RIC Co Southern California Electric Co. (G BO STON. MASS. LOS ANGELES, CAL. = “tCA OO NEW YORK BALTIMORB 625 S. Main 316 W. 7th St. i a Arnold Navy Type Loose Coupler Price,, $15.00 : Perhaps you have noticed | specialize and 3 ths instrument is my specialty. Une must ex- = cel when efforts are concentrated on a single = instrument. These instruments are not and = never were ground out in quantities and the personality of the maker lost | make every in- strument myself, test it and know just what en- ters into its construction. With suitable inductance in conjunction with = an Audion Detector, this instrument has proven 2 very efficient for receiving undamped waves, = This Hook-up will be furnished to prespective - urchasers. | also carry the finest line of 2 PLEASE NOTE NEW ADDRESS Switch Points, Rubber Knobs Cabinets and — Accessories on the market. SEND 2c STAMP FOR BULLETIN No. 1 J. F. ARNOLD, 327 East 119th St., New York City ATTENTION “QST” READERS !! SAVE MONEY by purchasing your apparatus from me. Clapp-Eastham, “Radio,” Turney, De Forest, Brandes, Thordarson, Multi-Audi- Fone, Mignon and all other reliable makes of STANDARD radio instruments at money saving prices. Send a 2c. stamp for the new catalog of Mignon System Radio Receptors for damped and undamped waves SPECIAL FOR THIS MONTH:—A pair of mounting clips for tubular audion and wiring diagrams FREE with every detector order @ $5.00. Write for particulars. ARTHUR B. CHURCH 131 Hyland Ave., Ames, lowa. Always Mention “QST” When Writing to Advertisers ot
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shins i= 2000 Ohm Complete 3000 Ohm Complete Double Set Double Set $5.00 ALL AMATEUR STATIONS now equipped with MURDOCK ’PHONES are getting ALL the signals, ALL the time. We want every amateur to know that we GUARANTEE these remarkably low priced ‘phones to be equal in EVERY RESPECT to any for which you may pay DOUBLE the money. We could not, in justice, make such a guarantee, unless we had the goods to deliver. If YOU have never tried the MURDOCK "PHONES, why not ORDER A SET TODAY? Your money back at once, if you don’t care to keep them. Other MURDOCK APPARATUS for amateur use, right in price and in performance: Moulded Transmitting Condenser, per section. . $2.00 Oscillation Transformer No. 424.............. 1.00 Variable Condenser No. 366, .001 mfd........ 4.00 Variable Condenser No. 368, .0005 mfd........ 3.00 The best stations are equipped with some MURDOCK instru- ments. How about YOURS? Our catalog is FREE to those inter- ested. Wm. J. Murdock Company 20 Carter St., Chelsea, Mass. Always Mention “QS T” When Writing to Advertisers } 9? | 4.00 = | ; |
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Mesco Short Wave Regenerative Receiver This short wave regenerative receiver or receiver set is particularly recommended for long discance relay work on wave lengths approximating 180 to 450 meters. It is pe le, however, to receive wave lengths up to nearly 1,000 meters efficiently with reduced amplification. [he circuit employed is of the well known Armstrong regenerative type with con- stants accurately calculated for the wave lengths referred to above when employed in conjunction with any of the audion detectors described in this manual. With this set it is possible to receive undamped and damped waves. When listening List Neo. 8467 MESCO Short Wave Regenerative Receiver PRICE, $32.50 t itter, although the tone of the incoming spark signal is somewhat changed, it is amplified many times when adjusted properly. It is possible then, under these circumstances, to hear and read stations that would be totally inaudible with ordinary receiving sets. It will increase the receiving range of any station over 100 times. The receiver is complete in every detail and ready for operation when connected to al, ground, audion detector and telephone receivers. The cabinet is made of weathe red oak having all connections brought out on a genuine hard rubber panel which decreases insulation losses. A blue print of connections with detailed instructions for setting up and operating thie receiver is supplied with each instrument. Both tube and round type audion detectors can be used successfully with it. e metal parts are of brass, nickel polished. SEND FOR OUR NEW CATALOG H28 It ie pocket size, 8x4% inches, contains 248 pages, with over 1,100 illustrations, and describes in plain, clear lenwuage all about Bells, Push Buttons, Batteries, Telephone and Telegraph Material, Electric Toy Bergler and Fire Alarm Contrivances, Electric Cal) Bells, Electric Alarm Clocks, Medical Betteries, Motor Boat Horns, Electrically Heated Apparatus, Battery Connectors, Switches, Battery \ Instruments, Ignition Supplies, Etc. There exiet a theusand and ome ways where electrical devices may be used, and te know what is beet fer yeur purpese you need this catalog. It costs you nothing. Send 10c for copy of our Wireless Manual H9. You get your money back on an order of $1.00 It contains 180 pages and tells how to erect and maintain wireless telegraph stations. Shows a number of diagrams. Has the Morse and Continental Telegraph Codes. Illustrates the best instruments o se: telle what they are for and how to use them. Has many new diagrams and other valuable infor- ot contained in any other book. Do not wait. Send your request now. Get the best 10c. value — will ever bay. Manhattan Electrical Supply Co. NEW YORK CHICAGO ST. LOUIS 17 Park Place 114 8. Sth Ave. 1106 Pine St. SAN FRANCISCO 604 Mission Street Always Mention “QST” When Writing to Advertisers | | | | | | | | |
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