• Country
• United States of America (USA)

• Manufacturer / Brand
• Gulbransen Co.; Chicago

• Year
• 1931/1932

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 18671

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

• Number of Tubes
• 10

• Valves / Tubes
• 35 35 27 35 35 27 27 47 47 80

• Main principle
• Superhet with RF-stage; ZF/IF 175 kHz; Screengrid 1926-1935

• Tuned circuits
• 8 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

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

• from Radiomuseum.org
• Model: 20 early or late - Gulbransen Co.; Chicago

• Notes
• Push-pull af output stage.

• External source of data
• E. Erb 3-907007-36-0

• Circuit diagram reference
• Die «Thali Schemasammlung» führt das Modell.

• Literature/Schematics (1)
• Rider's Perpetual, Volume 2 = 1932 and before

• Other Models

• Here you find 64 models, 10 with images and 31 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Gulbransen Co.; Chicago