TRF-4 Junior
Polo Engineering Laboratories; New York, NY
- Country
- United States of America (USA)
- Manufacturer / Brand
- Polo Engineering Laboratories; New York, NY
- Year
- 1932
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 288389
Short Wave Craft November 1932 page 444
Short Wave Craft November 1932 page 444
- Number of Tubes
- 4
- Main principle
- TRF (Tuned-Radio-Frequency but use of regeneration unknown)
- 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)
- Material
- Wooden case
- from Radiomuseum.org
- Model: TRF-4 Junior - Polo Engineering Laboratories;
- Shape
- Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).
- Notes
-
The Polo Engineering Laboratories TRF-4 Junior covers 200 to 500 meters. It includes a walnut cabinet, lighted dial, and dynamic speaker.
- Price in first year of sale
- 12.00 USD
- Mentioned in
- Short Wave Craft November 1932 page 444
- Author
- Model page created by Wayne Childress. See "Data change" for further contributors.
- Other Models
-
Here you find 4 models, 3 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Polo Engineering Laboratories; New York, NY