Loud Speaking Telephone D Form C

BTH (B.T.H.), British Thomson-Houston Co, Ltd.

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Country
Great Britain (UK)

Manufacturer / Brand
BTH (B.T.H.), British Thomson-Houston Co, Ltd.

Year
1924

Category
Loudspeaker, headphone or earphone

Radiomuseum.org ID
104406

Picture
Schematics

Loud Speaking Telephone D; BTH B.T.H., British (ID = 461044) Speaker-P — BTH B.T.H., British Loud Speaking Telephone D (1)

Loud Speaking Telephone D; BTH B.T.H., British (ID = 461045) Speaker-P — BTH B.T.H., British Loud Speaking Telephone D (1)

Loud Speaking Telephone D; BTH B.T.H., British (ID = 907232) Speaker-P — BTH B.T.H., British Loud Speaking Telephone D (1)

Loud Speaking Telephone D; BTH B.T.H., British (ID = 907233) Speaker-P — BTH B.T.H., British Loud Speaking Telephone D (1)

Loud Speaking Telephone D; BTH B.T.H., British (ID = 907234) Speaker-P — BTH B.T.H., British Loud Speaking Telephone D (1)

Loud Speaking Telephone D; BTH B.T.H., British (ID = 1545263) Speaker-P — BTH B.T.H., British Loud Speaking Telephone D (2)

Loud Speaking Telephone D; BTH B.T.H., British (ID = 1778971) Speaker-P — BTH B.T.H., British Loud Speaking Telephone D (2)
Picture courtesy of guest Janet Richardson

Loud Speaking Telephone D; BTH B.T.H., British (ID = 1778972) Speaker-P — BTH B.T.H., British Loud Speaking Telephone D (2)
Picture courtesy of guest Janet Richardson

Loud Speaking Telephone D; BTH B.T.H., British (ID = 1778973) Speaker-P — BTH B.T.H., British Loud Speaking Telephone D (2)
Picture courtesy of guest Janet Richardson

Technical Specifications

Wave bands
- without

Power type and voltage
Storage and/or dry batteries

Loudspeaker
Horn / Ø 9.25 inch = 23.5 cm

Material
Various materials

from Radiomuseum.org
Model: Loud Speaking Telephone D [Form C] - BTH B.T.H., British Thomson-

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

Other Models
Here you find 40 models, 35 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.

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The model Loud Speaking Telephone is part of the collections of the following members.

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