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Year: 1924 | Category: Loudspeaker, headphone or earphone |
Wave bands | - without |
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Details | |
Power type and voltage | Storage and/or dry batteries |
Loudspeaker | Horn / Ø 9.25 inch = 23.5 cm |
Power out | |
from Radiomuseum.org | Model: Loud Speaking Telephone D [Form C] - BTH B.T.H., British Thomson- |
Material | Various materials |
Shape | Miscellaneous shapes - described under notes. |
Dimensions (WHD) | 18 x 9.25 x 0 inch / 457 x 235 x 0 mm |
Notes | Electro-dynamic driver! Cast metal base, brown-enamelled metal horn. |
Price in first year of sale | 12.10 £ |
Mentioned in | Radio! Radio! (fig.834) |
Literature/Schematics (1) | Advert in Modern Wireless, Sept.1924, p.438 |
Model page created by Jean-Luc Comblin. See "Data change" for further contributors.
All listed radios etc. from BTH (B.T.H.), British Thomson-Houston Co, Ltd.
Here you find 32 models, 27 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.