• Country
• United States of America (USA)

• Manufacturer / Brand
• Kolster; USA

• Year
• 1928

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 45710

• • Brand: International

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

• Number of Tubes
• 6

• Valves / Tubes
• 27 27 50 50 unknown_Tube unknown_Tube

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 100-110; 110-120 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• from Radiomuseum.org
• Model: Power Amplifier - Kolster; USA

• Notes
• Push-pull af output stage.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 6 = 1935 and before

• Mentioned in
• Rider's Misc. Page 6-18

• Other Models

• Here you find 102 models, 48 with images and 67 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Kolster; USA