• Country
• United States of America (USA)

• Manufacturer / Brand
• American Transformer Co.; Newark (NJ)

• Year
• 1930 ??

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 32587

• • alternative name: Amertran

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

• Number of Tubes
• 7

• Valves / Tubes
• 27 27 27 50 50 81 81

• from Radiomuseum.org
• Model: Amertran Power Amp. 250 - American Transformer Co.;

• Notes
• Power Amp and Power Supply for a Radio Unit.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

• Other Models

• Here you find 16 models, 10 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from American Transformer Co.; Newark (NJ)