World War II Every Day Life

Color Pictures of World War II Royalty Free

Royalty Free Pictures of World War II


Signal Center, Pentagon Building, Washington DC. Final tank condensers and antenna coupling condensers of the press wireless 40-kw transmitter. This is a straight r.f. amplifier with a frequency rage from 5.3-21.0 megacycles, utilizing a class "C" push pull cross neutralized circuit. The plate tank circuit of this stage consists of a tapped inductance and two variable tuning condensers technically ganged and are arranged so they can be operated in a series of parallel as determined by the operating frequency. The two 233 type tubes are located directly behind the final tank turning condensers. Here the M/Sgt. hold a set of shorting bars which adjusts the amount of inductance on the take coil.

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