Variable Air Condenser 239-E
General Radio Company; Cambridge (MA)
- Country
- United States of America (USA)
- Manufacturer / Brand
- General Radio Company; Cambridge (MA)
- Year
- 1925 ??
- Category
- Radio part (not a module)
- Radiomuseum.org ID
- 234392
-
- alternative name: GenRad
- Main principle
- RF-Circuit or wave trap (separate, can also be an antenna with amp.)
- Wave bands
- - without
- Power type and voltage
- No Power needed
- Loudspeaker
- - - No sound reproduction output.
- Material
- Wooden case
- from Radiomuseum.org
- Model: Variable Air Condenser 239-E - General Radio Company;
- Shape
- Tablemodel, with any shape - general.
- Dimensions (WHD)
- 150 x 173 x 150 mm / 5.9 x 6.8 x 5.9 inch
- Notes
-
General Radio Variable Air Condenser type 239-E.
The plates of this condenser are so cut as to obtain a nearly uniform wavelength variation. The plates are spaced 1/32"; 17 plates are stationary and 16 rotary. The approximate 0º capacitance is 30 pF, the maximum capacitance is 1025 pF.
The steel shaft runs in 45º brass cone bearings.
- Net weight (2.2 lb = 1 kg)
- 1.915 kg / 4 lb 3.5 oz (4.218 lb)
- Author
- Model page created by Gidi Verheijen. See "Data change" for further contributors.
- Other Models
-
Here you find 238 models, 212 with images and 128 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from General Radio Company; Cambridge (MA)
Collections
The model Variable Air Condenser is part of the collections of the following members.