• Country
• United States of America (USA)

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

• Year
• 1929

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 35648

• • alternative name: American Graphophone || Columbia Recording

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

• Number of Tubes
• 8

• Valves / Tubes
• C327 C327 C327 C327 C327 CX345 CX345 CX380

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown); Screengrid 1926-1935

• Tuned circuits
• 4 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Details
• Record Player (not changer)

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: Electric Viva-tonal and Kolster Radio Combination 940 - Columbia Phonograph, American

• Shape
• Console, Lowboy (legs < 50 %).

• Notes
• One dial (primary tuning control knob), push-pull af output stage, CX-380 used in separate power unit.
  Electric record reproducer.

• Price in first year of sale
• 320.00 USD

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Circuit diagram reference
• Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Literature/Schematics (1)
• -- Original prospect or advert (Knoxville News Sentinel (newspaper), 14 Nov, 1929)

• Other Models

• Here you find 104 models, 70 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