The AN/ARC-5 series of "Command Set" radios is
an updated version of the ATA/ARA and SCR-274N radios. They were used by
the US Navy during the latter part of World War II (and even after the
war) and were their main aircraft communication radios. The AN/ARC-5 was
fitted in many different bomber and fighter aircraft for the purpose of
communicating between aircraft, navigation, and back to base. A fighter
plane would usually be fitted with 1 receiver and 1 transmitter. A bomber
would often be fitted with 3 receivers and 3 transmitters. Power for the
transmitters came from the MD-7 modulator which also has
a DY-8 dynamotor to generate the high voltage.
This is a like-new unmodified T-21/ARC-5 transmitter. It is the model #9311
manufactured by Stromberg Carlson for the U.S. Navy for use during WWII.
It covers 5.3 - 7 Mhz. This transmitter was purchased new by the original
owner in the early 1950s and then stored practically untouched until I
purchased it from him.