Recent Progress in Radio Communication in Germany and Austria

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.