Abstract
After describing the general trend of radio development in Central Europe during and immediately after the war, there are described in detail a low power tube radiophone transmitter and receiver; a very short wave tube telegraph transmitting and receiving set; an audio frequency three-step amplifier; a complete loop antenna and receiving set having a four-step radio frequency amplifier, detector, and two-step audio frequency amplifier; an external heterodyne oscillator; a four-step radio frequency amplifier; a complete radio goniometer receiver; an assembly of apparatus for radio frequency measurements; and a portable wave meter.
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