• Year
  • 1965 ??
  • Category
  • Military Receiver
  • Radiomuseum.org ID
  • 187901

 Technical Specifications

  • Number of Tubes
  • 13
  • Number of Transistors
  • 1
  • Semiconductors
  • Main principle
  • Superhet with RF-stage; ZF/IF 4300 kHz; 1 AF stage(s)
  • Tuned circuits
  • 8 AM circuit(s)     9 FM circuit(s)
  • Wave bands
  • Wave Bands given in the notes.
  • Power type and voltage
  • Batteries / addl. power jack / 1.45 & 45 or 24 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: R-744/PRR - MILITARY U.S. different makers
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 370 x 139 x 168 mm / 14.6 x 5.5 x 6.6 inch
  • Notes
  • U.S. military communications receiver for COMINT intercept missions. Also used by Canada and Australia. Used during the Vietnam War.

    Frequency range 20-100 MHz AM/FM/CW. Has three RF stages, a two-tube L.O., four IF stages, AM and FM det. BFO and one AF stage for headphones only. There is also a crystal calibrator for every 2 MHz.

    Single band: 20-100 MHz continuously with inductive tuning. Two antenna inputs, normal and DF antenna switch selectable. The four IF stages, FM det., BFO, AF stage and crystal calibrator are all plug-in modules for easy replacement.

    Each module is made of aluminium and has the size and socket of a 7-pin miniature tube. All modules contain a sub-miniature tube with all its components and is sealed.

    The receiver can be operated from internal dry batteries or from a 24V vehicle system. The receivers were made by various manufacturers and exist in some variants.

  • Net weight (2.2 lb = 1 kg)
  • 5.8 kg / 12 lb 12.4 oz (12.775 lb)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (U.S. Army TM5825-203-20)

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