The principles underlying radio communication (1922)
United States. National Bureau of Standards, Ould, Richard Sheldon, 1889-, United States. Army. Signal Corps · Washington, Govt. Print. Off. · leaf 377
t any desired amount of self-inductancemay be used. The hot-wire ammeter is used for measuring the current inthe antenna circuit. For merely tuning to resonance a low-resistance lamp such as a small flashlight lamp may be used inplace of the hot-wire ammeter, the maximum current being indi-cated by… … Pig. 197.—Double helix oscillation transformer; coils separated axially. cuited except when actually needed in order to keep the resist-ance of the antenna circuit low. ADJUSTMENTS OF TRANSMITTING SETS. 373 162. Direct Coupled Transmitting Set.—Direct instead of in-ductive coupling may be used…
Telegraph, Wireless · Radio
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