• Country
• United States of America (USA)

• Manufacturer / Brand
• Polytechnic Research & Development Co, Inc. (PRD); Brooklyn, NY

• Year
• 1950 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 133353

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 115; 230 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: DC Power Supply 807 - Polytechnic Research &

• Shape
• Tablemodel, with any shape - general.

• Notes
• Power supply for lab and production line use. 'B' supply -600 to +600 V at 200 mA regulated; 'C' supply 0 to -250 V at 5 mA; additional fixed -250 V at 50 mA; filament 6.3 V c.t. at 10 A.

• Price in first year of sale
• 275.00 $

• Source of data
• -- Original prospect or advert

• Literature/Schematics (1)
• Electronics, Nov. 1954.

• Author
• Model page created by Emilio Ciardiello. See "Data change" for further contributors.

• Other Models

• Here you find 11 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Polytechnic Research & Development Co, Inc. (PRD); Brooklyn, NY