• Country
• United States of America (USA)

• Manufacturer / Brand
• Major Laboratories

• Year
• 1929 ??

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 46748

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

• Number of Tubes
• 2

• Valves / Tubes
• 112A 112A

• Main principle
• Audio-Amplification

• Wave bands
• - without

• from Radiomuseum.org
• Model: 12 - Major Laboratories

• External source of data
• Ernst Erb

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

• Mentioned in
• Misc- Page 1-14

• Other Models

• Here you find 4 models, 0 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Major Laboratories