• Country
• United States of America (USA)

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

• Year
• 1950

• Category
• Military Equipment (not Re, Tr or RXT)

• Radiomuseum.org ID
• 206636

• Number of Tubes
• 18

• Valves / Tubes
• 6H6 6H6 6SJ7 6V6GTY 6V6GTY 6SL7GT 6SJ7 6H6 6SL7 6SJ7 6Y6G 6SQ7 6SJ7 6SJ7 6H6 6SJ7 6SA7 6SA7

• Main principle
• RF Converter/Adapter (not voltage converter); ZF/IF 470 kHz

• Wave bands
• Wave Bands given in the notes.

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

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Dual Diversity Converter CV-31B/TRA-7 - MILITARY U.S. different makers

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

• Dimensions (WHD)
• 19 x 19.25 x 19 inch / 483 x 489 x 483 mm

• Notes
• This is the Dual Diversity Converter of the Radio Receiver R-336/GRC-26 of the Radio Set AN/GRC-26. It is powered by the Power Unit PP-193A/TRA-7. The converter takes the IF signal from the receiver and has an FM discriminator circuit to receive CW, FS tone and voice signals as well as FS radioteletype signals.

• Net weight (2.2 lb = 1 kg)
• 125 lb (125 lb 0 oz) / 56.750 kg

• Author
• Model page created by Hank Kaczmarski. See "Data change" for further contributors.

• Other Models

• Here you find 397 models, 349 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)