- Country
- United States of America (USA)
- Manufacturer / Brand
- MILITARY U.S. (different makers for same model)
- Year
- 1965 ??
- Category
- Military Receiver
- Radiomuseum.org ID
- 187901
- 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)
- Author
- Model page created by Christer Falkenström. See "Data change" for further contributors.
- Other Models
-
Here you find 398 models, 350 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)
Collections
The model R-744/PRR is part of the collections of the following members.