Professional Headset 2000, 3000, 4000
Trimm; Libertyville and Chicago
- Country
- United States of America (USA)
- Manufacturer / Brand
- Trimm; Libertyville and Chicago
- Year
- 1923 ?
- Category
- Loudspeaker, headphone or earphone
- Radiomuseum.org ID
- 218746
Courtesy of Walter Z. Seldon.
Courtesy of Walter Z. Seldon.
Courtesy of Walter Z. Seldon.
Courtesy of Walter Z. Seldon.
- Wave bands
- - without
- Power type and voltage
- No Power needed
- Loudspeaker
- - Is a Headphone or Earphone
- Material
- Various materials
- from Radiomuseum.org
- Model: Professional Headset 2000, 3000, 4000 - Trimm; Libertyville and
- Notes
-
Trimm Professional Model 2000, 3000, 4000 Headset has the following features:
- Manufactured with the same basic design for decades with various impedances.
- Model 3000 Ohms:
- Original model.
- Moulded Bakelite cases and ear caps.
- Single bar Tungsten steel magnets.
- Light weight.
- Exceptional tone and volume.
- Initial price was $7.65 USD.
- Model 4000 Ohms:
- Later model.
- Moulded Bakelite cases and ear caps.
- Forged magnet of chrome steel.
- Impregnated coils.
- 5 ft. moisture-proof, wear-resisting cord.
- Entirely concealed terminals.
- Fabric covered headband.
- Price was $2.94 USD.
- Model 2000 Ohms:
- Later model.
- Similar to 4000 Ohm model.
- Price in first year of sale
- 7.65 USD
- Mentioned in
- Radio Broadcast, Nov. 1925, p. 66
- Literature/Schematics (1)
- Popular Radio, Oct. 1923, page 76.
- Literature/Schematics (2)
- Radio Digest, March 8, 1924, page 18.
- Literature/Schematics (3)
- Bernstein-Applebee, 1950 Catalog No. 501, page 128.
- Author
- Model page created by Hans-Joachim Korn † 16.11.15. See "Data change" for further contributors.
- Other Models
-
Here you find 20 models, 20 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Trimm; Libertyville and Chicago
Collections
The model Professional Headset is part of the collections of the following members.