AmplifyingTransformer type A 400
DeForest Radio Telephone & Telegraph Co. (De Forest); New York
- Country
- United States of America (USA)
- Manufacturer / Brand
- DeForest Radio Telephone & Telegraph Co. (De Forest); New York
- Year
- 1922 ?
- Category
- Radio part (not a module)
- Radiomuseum.org ID
- 260686
-
- alternative name: Lee De Forest Mfg.
- Wave bands
- - without
- Power type and voltage
- No Power needed
- Loudspeaker
- - - No sound reproduction output.
- Material
- Various materials
- from Radiomuseum.org
- Model: AmplifyingTransformer type A 400 - DeForest Radio Telephone &
- Dimensions (WHD)
- 55 x 80 x 40 mm / 2.2 x 3.1 x 1.6 inch
- Notes
-
Mentioned in 'Modern Radio Practice' by Hayward (1923) Page 214 Fig.160 shows the De Forest A 400 Amplifying transformer which is placed between the stages and consists of primary and secondary windings. In various types the ratio of turns varies from 3 to 1 up to 9 to 1.
- Mentioned in
- -- Original-techn. papers. (Modern Radio Practice by Hayward (1923) Page 214 fig.160)
- Author
- Model page created by Lindsay Shepherd. See "Data change" for further contributors.
- Other Models
-
Here you find 158 models, 132 with images and 16 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from DeForest Radio Telephone & Telegraph Co. (De Forest); New York
Collections
The model AmplifyingTransformer type A 400 is part of the collections of the following members.