Radio Set SCR-694 (BC-1306) 1943 US Army Film Bulletin FB-145; World War II

more at http://quickfound.net/

'Shows the set in operation as its coverage, range, and types of transmission are described. Enumerates its special features, such as the panel guard, the crystal compartment, waterproofing, and internal construction. Identifies components of the set. Also describes the hand generator, the vibrator power supply, and the horizontal and vertical antennas.'

Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.

The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).

https://en.wikipedia.org/wiki/SCR-694

Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/

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

History

The SCR-694 replaced the SCR-284 and was later replaced by the AN/GRC-9. 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.

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 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