- País
- Gran Bretaña (GB)
- Fabricante / Marca
- BTH (B.T.H.), British Thomson-Houston Co, Ltd.
- Año
- 1929 ?
- Categoría
- Micrófono o Pick-up
- Radiomuseum.org ID
- 346763
- Gama de ondas
- - no hay
- Tensión de funcionamiento
- No necesita alimentación
- Material
- Materiales diversos
- de Radiomuseum.org
- Modelo: Pick-Up - BTH B.T.H., British Thomson-
- Anotaciones
-
This type of pick-up is used by the Cliftophone Company as well as the B.T.H., the former fitting their well-known parallel action tonearm, and the latter a tubular telescopic tonearm.
The cobalt steel permanent magnet is of generous cross-section, and the pole pieces are arranged to give differential variations of the magnetic field which are converted to electrical energy in the pick-up coil surrounding the armature. The armature is of small dimensions, which would lead one to expect good reproduction of high frequencies.
This surmise is confirmed by the test, and the output at 4,000 cycles is practically the same as. at 250 cycles. The movement is lightly damped, and record wear is very low. In every respect a first-class job.
- Mencionado en
- Wireless World (The), London (WW, 79) (Mar 6, 1929, Page 260)
- Autor
- Modelo creado por Gary Cowans. Ver en "Modificar Ficha" los participantes posteriores.
- Otros modelos
-
Donde encontrará 40 modelos, 35 con imágenes y 5 con esquemas.
Ir al listado general de BTH (B.T.H.), British Thomson-Houston Co, Ltd.