• Country
• United States of America (USA)

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

• Year
• 1931

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 43445

• Number of Tubes
• 4

• Valves / Tubes
• 24 24 47 80

• Main principle
• TRF with regeneration; 1 AF stage(s)

• Tuned circuits
• 2 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) / Ø 19 cm = 7.5 inch

• Power out
• 2.5 W (undistorted)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Graybarette 4 GB4 - Graybar Electric Co.; New York

• Shape
• Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).

• Dimensions (WHD)
• 290 x 380 x 195 mm / 11.4 x 15 x 7.7 inch

• Notes

• This model is similar to and has the same schematic as Radiolette R-5.

• External source of data
• Ernst Erb

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

• Literature/Schematics (1)
• Rider's Perpetual, Volume 2 = 1932 and before (page 2-5 for Radiolette R-5)

• 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)