• Country
• United States of America (USA)

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

• Year
• 1959

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

• Radiomuseum.org ID
• 206717

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

• Number of Tubes
• 14

• Valves / Tubes
• 6C4 12AX7 6BA6 6BA6 6AQ5 6AQ5 6AL5W 811A 811A 3B28 3B28 3B28 3B28 5R4WGY

• Main principle
• Transmitter

• Wave bands
• VHF incl. FM and/or UHF (see notes for details)

• Power type and voltage
• Alternating Current supply (AC) / 105-125, 210-250 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Modulator - Power Supply MD-141A/GR - MILITARY U.S. different makers

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

• Dimensions (WHD)
• 19 x 12.25 x 24 inch / 483 x 311 x 610 mm

• Notes
• The MD-141A/GR Modulator-Power Supply is the baseband unit of the AN/GRT-3 Radio Transmitter. It consumes 380 mains watts in either of two mains voltage ranges and is rated for continuous duty. It is capable of narrow-band modulation of 400 to 3000 Hz or broad-band modulation of 200 to 20,000 Hz both ranges being amplitude modulation with an input impedance of 50 or 600 ohms. The modulated B+ voltage is then fed to the system's transmitter unit, the Model T-282D/GR

• Net weight (2.2 lb = 1 kg)
• 170 lb (170 lb 0 oz) / 77.180 kg

• Source of data
• - - Data from my own collection

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

• Other Models

• Here you find 393 models, 345 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)