• Country
• United States of America (USA)

• Manufacturer / Brand
• Columbia Phonograph, American / Volta Graphophone Company; USA

• Year
• 1932

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 35686

• • alternative name: American Graphophone || Columbia Recording

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

• Number of Tubes
• 11

• Valves / Tubes
• 58S 56 58S 58S 4S 57S 57S 58S 47 47 82

• Main principle
• Superhet with RF-stage; ZF/IF 175 kHz

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC)

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

• from Radiomuseum.org
• Model: C-90 - Columbia Phonograph, American

• Notes
• Reactance resonance indicator; push-pull af output stage.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 3 = 1933 and before

• Other Models

• Here you find 118 models, 84 with images and 34 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Columbia Phonograph, American / Volta Graphophone Company; USA