• Country
• United States of America (USA)

• Manufacturer / Brand
• MILITARY U.S. (different makers for same model)

• Year
• 1944

• Category
• Military Transceiver (TRX)

• Radiomuseum.org ID
• 187885

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 15

• Valves / Tubes

• Main principle
• Transceiver; ZF/IF 385 kHz

• Wave bands
• Short Wave (SW only)

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Metal case

• from Radiomuseum.org
• Model: SCR-543 BC-669- - MILITARY U.S. different makers

• Shape
• Boatanchor (heavy military or commercial set >20 kg).

• Notes
• Radio Receiver and Transmitter BC-699-(*), part of SCR-543:
  Receiver / Transmitter, coverage 1.7 - 4.4 MHz, AM / CW,
  Operation voltages 12/24 and 280 VDC provided by matching power supply PE-110-(*) and motor generator PE-108-(*);
  matching handset TS-11-(*) or headset HS-30 or HS-22-C and microphone T-24-(*);
  matching antenna base MP-37 and counterpoise CP-15-(*).
  Matching remote control RM-21-(*).
  Some sets have been produced by Hallicrafters and Electrical Research Laboratories.

• Mentioned in
• TM11-625

• Literature/Schematics (1)
• The Surplus Handbook - Receivers and Transmitters (pag. 41-42)

• Author
• Model page created by Martin Bösch. See "Data change" for further contributors.

• Other Models

• Here you find 399 models, 351 with images and 210 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from MILITARY U.S. (different makers for same model)