- Country
- United States of America (USA)
- Manufacturer / Brand
- Gulbransen Co.; Chicago
- Year
- 1931/1932
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 18672
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 10
- Main principle
- Superhet with RF-stage; ZF/IF 175 kHz; 2 AF stage(s); Screengrid 1926-1935
- Tuned circuits
- 8 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Alternating Current supply (AC) / see in text: 110 volt, also possible for 220 Volt
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- from Radiomuseum.org
- Model: 23 - Gulbransen Co.; Chicago
- Notes
- Push-pull AF output stage; different power transformers are used for 110 V (25 cycle), 110 V (60 cycle) or 110, 220 V (40-60 cycle) mains supply. The series 23 chassis was also used for Lafayettte 10C - family in 1931/32. As Gulbransen model 235 it was also sold in Switzerland.
- 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