SCR-694

The SCR-694 was a portable two way radio set used by the U.S. military during World War II.

History
The SCR-694 began to replace the SCR-284 from mid 1944, with improved range and reduced weight (around half of its predecessor), though the latter continued to be used up until the end of the war. Designed to provide communication between moving or stationary vehicles or as a portable field radio set, the SCR-694 was originally intended for use by mountain troops and airborne forces but soon became the Army-wide standard at battalion level.

The SCR-694 saw use all over the army in many different theaters; notable instances include at regimental division headquarters during the Normandy invasion and the Cabanatuan prison raid as well as by scouts and reconnaissance units in the Pacific War.

It was later replaced by the AN/GRC-9, which saw first documented use in the Korean war.

Specifications
The SCR-694 "Radio set, Portable/Vehicular" consisted of the BC-1306 vacuum tube transmitter/receiver capable of AM and CW mode operation between 3.800 and 6.500 MHz.
 * Weight — 19.5 pounds.
 * Range — up to 15 miles on AM voice. Up to 30 miles reported on Morse code between moving vehicles
 * Transmitter — Crystal control, frequency doubler
 * Power supply — 6, 12 or 24 Volts DC, PE-237 Vibrator Power Unit
 * Optional accessories — hand crank generator with seat, antenna system, spares tube kit, canvas bags, Jeep mounting plates.
 * Manual — TM 11-230C