• Country
• United States of America (USA)

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

• Year
• 1951 ?

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 181083

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

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries / 24 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Power Supply PP-281 & PP-282 - MILITARY U.S. different makers

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 73 x 113 x 148 mm / 2.9 x 4.4 x 5.8 inch

• Notes
• PP-282 is a steel box, containing a 115 Hz synchronous vibrator transformer PSU with choke, power out 135 volts DC at 118 mA. The schematic diagram can be found at the inside of the bottom-plate. It is a very compact unit and it fits in several models of military radio-equipment: AM-65/GRC, R-108/GRC, R-109/GRC, R-110/GRC. The PP-281/GRC variant is fitted if the equipment must operate from a 12 volts battery.

• Net weight (2.2 lb = 1 kg)
• 2.5 kg / 5 lb 8.1 oz (5.507 lb)

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

• Literature/Schematics (1)
• -- Schematic (TM11-291 dated 1951 ,)

• Author
• Model page created by Jan Terranea. See "Data change" for further contributors.

• Other Models

• Here you find 394 models, 346 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)