Lane Technical High School - Chicago
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By Wm. F. Hawley
from  Page 98-99, 
CH PREP 'June 1927


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February saw a great change in our station. Tubes disappeared, parts hung by one support and wires flew this way and that. Our aerial was no more.

But now order emerges from the chaos. A new transmitter and a new aerial appear. Trim and neat is the workmanship and sure is the design. And why not? Haven't we the athletic

Mr. Sommers, the thoughtful Mr. Heinzelman, the inventive Mr. Berlund and the wizard Mr. Pearne, to direct us to the correct path. And besides, do not forget those who worked sometimes to nine o'clock to see the set completed. They are as follows: William Loebel, Harry Rowe Jr., William Hawley and John Kautzner.

Besides appearance our set has the ability to reach as far as Wichert, Illinois, sixty miles away which heard us in day time. No mean accomplishment for one hundred watts. And even many requests have been received from various parts of the city.

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Perhaps you should be interested in an explanation of how the circuit works. Here it is;

When the tubes are lighted and the plate switched closed let us say a positive potential is created on. the grids of the oscillator tubes, (It works out the same if a negative potential is created.) This causes an increase above the normal plate current in the plate circuits of the tubes but the radio frequency choke in the plate circuit prevents the increase from flowing into the plate battery. It therefore charges the condenser plate to which it can flow, minus, producing a plus charge on the other plate. This causes current to flow from the helix through the upper tap (which you way mark A with your pencil) and into the coil through the filament tap (which you may mark B.) This current produces a on increasing field of magnetism which travels through the lower part of the helix, B to the lower or grid tap (which you may mark C.) Since the magnetism increases it creates a difference in potential between Band C.  B is positive and C is negative. C being negative the condenser plate to which it is connected becomes charged, charging the other plate positive and making the grid negative through the well known law of inductance.

This negative charge lowers the plate current to a greater degree than is was before increased since the tubes are amplifiers. The radio frequency choke again stops the current, the condenser is charged, a current flows in the coil, this time however from A to B, produces magnetism, creates a negative potential at B and a positive one at C, charges the condenser and produces a potential at B and a positive one at C, charges the condenser and produces a positive charge on the grids which produces an increase in plate current greater than is was before decreased.


This keeps up till the current limit of the circuit is reached when it remains constant.

Nothing has been said of the modulator circuit till now but do not think it has been forgotten. The action of sound waves produces an irregular pulsating current in the input primary. This pulsating current produces an alternating current in the secondary.

When the grid terminal is positive to the filament terminal, the negative grid bias is lessened, producing an increase in plate current. Since the 30 Henery choke furnishes a constant current, this increase must be robbed from the oscillator tubes which decreases the amplitude of the radio frequency oscillations.

When the grid terminal is negative to the filament terminal, the negative bias is increased lessening the plate current of the modulator and allowing more current for the oscillators which promptly use it to increase the size of the oscillations.

It should be noted that any sound interrupted by the Mike does not change the frequency of the wave, it merely alter the amplitude, preserving the general characteristics of the sound wave.




The Lane Technical High School broadcasting station, W L T S, has been entirely rebuilt and remodeled, and the new station is hitting the high spots in radio popularity. Letters of commendation from all parts of Chicago and from outside the city have been received. The average Lane Indian is already well-informed as to the station's semi-weekly program but any student who is interested in knowing what the pro-. gram will be, should look in any Tuesday or Friday newspaper and there it will be in black and white.

"Go, Lane, Go," that popular school song which is emblematic of Lane in all its glory, is meeting with such acclaim that hardly a program is put on the air without its being sung. The new staff of W L T S is becoming very popular with the radio listeners, especially George Burhop, tenor, who is getting special attention. One listener described him as a future operatic star. Nate Collier's falsetto solos are enjoyed by the men listeners who often mistake Nate for a coloratura soprano. "James Kessler at the Lyon and Healy," is a popular phase with the radio audience, as Jimmy's popular medleys are living up to their name.

Bennie Horwitz and his ukulele are there with bell on too. Bill Lava, the classical-jass fellow, also has the job of telling the radio public that "so-and-so" just sang the Needle Song from "Haystack" by Findit. His classical piano numbers add a solemn touch to the otherwise merry proceedings. Then of course, Earl Storm and his harmless harmonica give quite a novelty to the trend of the program. Manuel Kupferberg is there, once or twice with his sassy saxophone, and Manny sure can handle the reed-box with vivacity.

Those, are some of the entertainers of WLTS, "Lane Tech-Chicago!" Listen in if you are lucky enough to have the chance, on any Tuesday or Friday between the hours of 1:00 and 2:30 P. M. on 258.5 meters.

From Page Sixty-six. THE LAN E T ECH PRE P June 1927

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Back Row, left to right, Wm. Hawley, Wm. Loebel, E. Demmann, Jno. Kautzner,
Mr. H. H.
Sommers, Mr. Frank D. Pearne, John Soller, Earl, Storm, Sam Mammina.

Front Row, left to right, E. Goldman, Harry C. Rowe, W. B. Lava,
George Burhop, J. Kesler,
and Nate Collier.

Editors note.... there are a few words there that are this way in the yearbook, but WORD says are wrong... I just left them the way they  were in the  Lane Technical High School Yearbook.  This school was also refered to as Lane Tech Prep also...
- ed sharpe, archivist for smecc


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