SP-2 2-Stage Audio Amplifier
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
- Audio Amplifier or -mixer
- Radiomuseum.org ID
- 186739
-
- alternative name: Lee De Forest Mfg.
- Number of Tubes
- 2
- Main principle
- Audio-Amplification; 2 AF stage(s)
- Wave bands
- - without
- Power type and voltage
- Storage and/or dry batteries
- Loudspeaker
- - This model requires external speaker(s).
- Material
- Wooden case
- from Radiomuseum.org
- Model: SP-2 2-Stage Audio Amplifier - DeForest Radio Telephone &
- Shape
- Tablemodel, Box - most often with Lid (NOT slant panel).
- Dimensions (WHD)
- 7.5 x 8.5 x 5 inch / 191 x 216 x 127 mm
- Notes
- The Sp line came out in early 1922. The deForest SP-2 was a standalone Two Step Audio Amplifier.
- Net weight (2.2 lb = 1 kg)
- 2.8 kg / 6 lb 2.7 oz (6.167 lb)
- Mentioned in
- Rider's Perpetual, Volume 3 = 1933 and before (Page 171)
- Literature/Schematics (1)
- Radio Manufacturers of the 1920s, Vol 1 (page 171)
- Author
- Model page created by Alan Larsen. 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 SP-2 is part of the collections of the following members.