• Country
• United States of America (USA)

• Manufacturer / Brand
• Graybar Electric Co.; New York (NY)

• Year
• 1929

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 197863

• Number of Tubes
• 5

• Valves / Tubes
• 24 24 24 45 80

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

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 105-125 Volt

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: 520-L Ch= RCA Radiola 44 - Graybar Electric Co.; New York

• Shape
• Console, Highboy (legs > 50 %).

• Notes
• Sold by Greybar. Radio internals are the RCA Radiola 44.

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

• Author
• Model page created by Joseph Koebel. See "Data change" for further contributors.

• Other Models

• Here you find 31 models, 16 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Graybar Electric Co.; New York (NY)