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RADIO BROADCAST
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if he had been attending a concert. Several other numbers were rendered by W J Z before the head sets were removed to permit asking and answering a number of questions that had come to the mind of J. B.
"The boy has been after me for some time to put in a set," said J. B., "but the landlord doesn't like the idea of a' lot of wires strung on the roof of the apartment, and so 1 guess we'll have to wait until we move."
"Lot of wires?" said Jim. "Why, man, you don't need any wires. I'm getting this stuff on that bedspring in .the next room. 1 just attach this wire to the spring and connect it to this terminal. You wouldn't want to hear that music better than 1 get it, would you?"
And so J. B. is finally convinced that a bedspring is all the antenna that is required under an\' and all conditions and he goes homie, buys an Aeriola Jr., takes it up to his apartment in Reading, connects it to the bedspring — and hears nothing. The result is a very much dissatisfied customer and all on account of a little wrong information passed on b\ some one who was not wholI\' informed.
The antenna of a radio receiving set consists of the wire or wires
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which collect the energy from the waves sent out by the transmitter. It is generally the most neglected part
of the set, and in the large majority of cases where satisfactory results are not obtained, assuming of course that the proper kind of a receiving set has been installed and that other fairly obvious conditions have been met, the trouble may be traced directly to a faulty antenna. Every one isn't as badly misinformed as J. B. was, of course, but there are other numerous pitfalls whose evil effects are not so obvious.
The strength of the sound that one hears from a radio set de
pends upon the voltage or electrical pressure created in the antenna by the waves from the transmitter and also upon the current, in the antenna wire.
A somewhat imperfect, but nevertheless helpful, analogy to an antenna wire is a large metal funnel supported above ground and connected to a rubber hose. Figure i shows a moderate size funnel corresponding to a small antenna. Suppose that a heavy shower is in progress. It will be easil\' seen that, if the rubber hose is not too large, the funnel will remain full and the water