• Country
• United States of America (USA)

• Manufacturer / Brand
• National Company; Cambridge & Malden (MA)

• Year
• 1932 ?

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 85167

• • alternative name: National Toy Co.
  • Brand: Thrillbox

• Number of Tubes
• 2

• Valves / Tubes
• 80 80

• Power type and voltage
• Alternating Current supply (AC) / 105-120 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Power Supply GR-DPU - National Company; Cambridge &

• Shape
• Rack

• Notes
• rack dual power supply, matches and powers one AGS and one 58C receiver

• Price in first year of sale
• 55.00 $

• Circuit diagram reference
• Rider's Perpetual, Volume 3 = 1933 and before

• Author
• Model page created by Martin Bösch. See "Data change" for further contributors.

• Other Models

• Here you find 446 models, 285 with images and 189 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from National Company; Cambridge & Malden (MA)