• Country
• United States of America (USA)

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

• Year
• 1935

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 84153

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

• Number of Tubes
• 1

• Valves / Tubes
• 280

• Wave bands
• - without

• Details
• Power Supply (not only Batt.El.)

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

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Power Unit 5897-AB - National Company; Cambridge &

• Shape
• Tablemodel, high profile (upright - NOT Cathedral nor decorative).

• Notes
• Power Supply for FB-7, FB-7-A, FBA, FBX-A and early HRO communication Receivers.
  Output Voltage 2.5 V/9.5 A AC and 230 V/65 mA DC B+. Attention: Transformer for 60Hz power-line!

• Price in first year of sale
• 35.00 $

• Source of data
• -- Collector info (Sammler)

• Mentioned in
• Shortwave Receivers - Past & Present (3rd ed.)

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 445 models, 284 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)