A-7 (transceiver)

The Soviet A-7 VHF radio transceiver (later models include the A-7a and A-7b) was developed during World War II and used for communication in rifle brigades and regiments.

Setting the frequency of the receiver and transmitter circuits is adjusted in tandem by one control handle.

The receiver section is a superheterodyne design with a single frequency conversion, consisting of 8 identical 2K2M valves.

[1] The transceiver with power supplies and accessories is housed in a wooden box with shoulder straps for carrying as a backpack.

In the transmitter section, the functions of the modulator and power amplifier were combined into one valve, and in the receiver section one valve was used to simultaneously perform the functions of a high-frequency and low-frequency amplifier (the so-called reflex circuit).