Headphones 4,000 ohms
- Great Britain (UK)
- Manufacturer / Brand
- BTH (B.T.H.), British Thomson-Houston Co, Ltd.
- 1924 ??
- Loudspeaker, headphone or earphone
- Radiomuseum.org ID
- Wave bands
- - without
- Power type and voltage
- No Power needed
- - Is a Headphone or Earphone
- Various materials
- from Radiomuseum.org
- Model: Headphones [4,000 ohms] - BTH B.T.H., British Thomson-
BTH headphones metal case 2,000 + 2,000 ohms earphones in series
- Mentioned in
- -- Collector info (Sammler) (Own collection)
- Model page created by Lindsay Shepherd. See "Data change" for further contributors.
- Other Models
Here you find 38 models, 33 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from BTH (B.T.H.), British Thomson-Houston Co, Ltd.