• Country
• United States of America (USA)

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

• Year
• 1930 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 54278

• Number of Tubes
• 8

• Valves / Tubes

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

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 110 Volt

• from Radiomuseum.org
• Model: GB989 GB989 - Graybar Electric Co.; New York

• Notes
• similar to RCA R-10 AC.

• External source of data
• Ernst Erb

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

• 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)