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 383
r-W Hffi/ cKoXeCeil -• •- av/xil mittidry … PiQ.20^ i\/ Tories - ^railel Conr\ectior\ crffoor ConcJ Aniens le\ers, changes simultaneously the adjustments on all threecoils. From these coils are taken out taps over which threeswitch blades pass, adjusting all the inductances to approxi-mately the values needed for the particular wave length…
Telegraph, Wireless · Radio
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