Detector and Two Stage Amplifier SP-4
- Category
- Radio module pre 1926 (not a part, not a key)
- Radiomuseum.org ID
- 201524
-
- alternative name: Lee De Forest Mfg.
- Main principle
- Detector with Vacuum Tube (Valve), no tuner; 2 AF stage(s)
- Power type and voltage
- Storage and/or dry batteries
- Loudspeaker
- - This model requires external speaker(s).
- from Radiomuseum.org
- Model: Detector and Two Stage Amplifier SP-4 - DeForest Radio Telephone &
- Shape
- Tablemodel, Box - most often with Lid (NOT slant panel).
- Dimensions (WHD)
- 8.8 x 7.4 x 0 inch / 224 x 188 x 0 mm
- Notes
- The De Forest Type SP-4 vacuum tube detector cabinet with two-stage audio amplifier.
- Net weight (2.2 lb = 1 kg)
- 12 lb (12 lb 0 oz) / 5.448 kg
- Literature/Schematics (1)
- Deforest Radio Equipment Catalog H page 8
- Author
- Model page created by Alan Larsen. See "Data change" for further contributors.
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