Switchbox BC-345

MILITARY U.S. (different makers for same model)

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  • Year
  • 1941 ??
  • Category
  • Military Equipment (not Re, Tr or RXT)
  • Radiomuseum.org ID
  • 336825

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

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Switchbox BC-345 - MILITARY U.S. different makers
  • Shape
  • Chassis only or for «building in»
  • Notes

  • Switchbox BC-345 was part of the US Army Signal Corp RC-32 Filter Equipment.

    The RC-32 filter set was connected in series between the aircraft receiver/transceiver and the pilot/copilot and consisted of the: FL-5-A or FL-5-E (Filter Unit), BD-345 (Switchbox), and CD-316 (Cord).  There were two RC-32 sets installed on each aircraft, one for the pilot and one for the copilot.  The RC-32 was used in many US military aircraft.  Refer to Literature(1) for more details on which aircraft used this equipment during WW2.

    The pilot/copilot connected their headset (HS-23) to the PHONES jack and selected the desired option with the three-position rotary switch.

    The options were:
    1. RANGE  (Range signal pass, Voice signal reject)
    2. VOICE   (Voice signal pass, Range signal reject)
    3. BOTH    (Voice signal pass, Range signal pass)

    The RANGE signal was a 1020Hz modulated directional radio beacon received by aircraft to assist aircraft to or from a landing field.

     

  • Literature/Schematics (1)
  • SC3585A Signal Section Air Service Command Airborne Radio Equipment Handbook, 1943 rev 2001
  • Literature/Schematics (2)
  • National Directory of Commodity Specifications, 3rd ed., June 1945, pg 715.21, "1941...BC-345"
  • Author
  • Model page created by Jerry Elarton. See "Data change" for further contributors.

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