• Country
• United States of America (USA)

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

• Year
• 1956 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 123254

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

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

• Number of Tubes
• 4

• Valves / Tubes
• 12AX7 6L6G 6L6G 5U4G

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 60 Hz, 117V = 110 -120 Volt

• Material
• Metal case

• from Radiomuseum.org
• Model: Horizon 20A - National Company; Cambridge &

• Shape
• Tablemodel, with any shape - general.

• Notes
• 20W audio amplifier uses a new 'unity coupled' output stage. 20 to 20,000Hz response within 1dB at full raated output.

• Price in first year of sale
• 85.00 $

• Literature/Schematics (1)
• The Radio-Electronic Master, 1956

• Literature/Schematics (2)
• Photofact Folder, Howard W. SAMS (Set 270 Folder 11)

• Literature/Schematics (3)
• Photofact Folder, Howard W. SAMS (Set 293 Folder 1 Production Changes Bulletin 134 dated 10-55)

• Author
• Model page created by Emilio Ciardiello. 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)