7 (Junior Model 7JR)
Zenith Radio Corp.; Chicago, IL
- Country
- United States of America (USA)
- Manufacturer / Brand
- Zenith Radio Corp.; Chicago, IL
- Year
- 1934/1935
- Category
- Car Radio, perhaps also + sound player/recorder
- Radiomuseum.org ID
- 67915
-
- alternative name: Chicago Radio Lab
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 5
- Main principle
- Superhet with RF-stage; ZF/IF 175 kHz
- Tuned circuits
- 5 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Storage Battery for all (e.g. for car radios and amateur radios) / =6 Volt
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- Material
- Metal case
- from Radiomuseum.org
- Model: 7 - Zenith Radio Corp.; Chicago,
- Shape
- Chassis only or for «building in»
- Notes
- The name 7JR is a doubtful listing. Should be just "7". Zenith parts list mentions "JR.Model 7" (not 7JR). It is sometimes listed as 7Jr as the smaller, cheaper "Junior" model, with only 5 tubes, for half the usual price. See also Cones-Bryant: Zenith, the early years, pp.193, 202.
- External source of data
- Ernst Erb
- Circuit diagram reference
- Rider's Perpetual, Volume 5 = ca. 1934 and before
- Mentioned in
- Zenith Radio The Early Years 1919-1935
- Literature/Schematics (1)
- Zenith Service Manual
- Other Models
-
Here you find 4505 models, 4101 with images and 3631 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Zenith Radio Corp.; Chicago, IL