Duplex Gap
Doolittle Co., F.M.; New Haven, Connecticut
- Country
- United States of America (USA)
- Manufacturer / Brand
- Doolittle Co., F.M.; New Haven, Connecticut
- Year
- 1921
- Category
- Amateur Equipment (Other, but not Key)
- Radiomuseum.org ID
- 260777
- Wave bands
- - without
- Power type and voltage
- No Power needed
- Loudspeaker
- - - No sound reproduction output.
- from Radiomuseum.org
- Model: Duplex Gap - Doolittle Co., F.M.; New Haven
- Notes
-
Device to allow an operator to hear the man you are working with through your own sending.
- Price in first year of sale
- 6.00 $
- Mentioned in
- Radio News (April 1921, Radio News magazine advertisement page 748)
- Author
- Model page created by Alan Larsen. See "Data change" for further contributors.
- Other Models
-
Here you find 6 models, 5 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Doolittle Co., F.M.; New Haven, Connecticut