FB-7 Series Coils
National Company; Cambridge & Malden (MA)
- País
- Estados Unidos
- Fabricante / Marca
- National Company; Cambridge & Malden (MA)
- Año
- 1933–1936
- Categoría
- Pieza de radio (no módulo)
- Radiomuseum.org ID
- 286307
-
- alternative name: National Toy Co.
- Brand: Thrillbox
- Gama de ondas
- Bandas de recepción puestas en notas.
- Tensión de funcionamiento
- No necesita alimentación
- Altavoz
- - - No hay salida de sonido.
- Material
- Material especial, que se describe en las notas.
- de Radiomuseum.org
- Modelo: FB-7 Series Coils - National Company; Cambridge &
- Forma
- Formas varias descritas en notas aparte.
- Anotaciones
-
The National FB-7 Series Coils are wound on R-39 coil forms and are protected by a bakelite sleeve with a metal "handle" to facilitate removal from the receiver. (R-39 is a low-loss dielectric.) The coils also have National's special 6-prong base, which is not compatible with standard 6-pin tube bases or sockets. These coils are air-tuned.
Each band requires an Oscillator and Detector coil, and are marked "OSC" and "DET" along with the frequency range. These coils plug into the front of the receiver.
Coils were not supplied with the receiver. Each band cost $10 (US) per pair of coils.
Note: The original coils were air tuned, but the National Bulletin No. 240 from 1934 shows both air and mica tuned coil form options. It is unclear if these correlate to the FB-7 and FB-7A receivers, as National literature used the designations "FB-7" and "FB-7A" interchangeably. Also, it is unclear if the mica tuned coil forms were ever used for production models.
Coil Freq. Range FB AA 18 - 34 MHz FB A 11.4 - 19.5 MHz FB B 7.0 - 11.7 MHz FB C 4.0 - 7.3 MHz FB D 2.4 - 4.2 MHz FB E 1.5 - 2.5 MHz FB F 0.9 - 1.5 MHz AB 20 20 Meters AB 40 40 Meters AB 80 80 Meters AB 160 160 Meters
- Precio durante el primer año
- 10.00 USD
- Mencionado en
- National Catalog No. 220 - 1933
- Autor
- Modelo creado por Wayne Childress. Ver en "Modificar Ficha" los participantes posteriores.
- Otros modelos
-
Donde encontrará 445 modelos, 284 con imágenes y 189 con esquemas.
Ir al listado general de National Company; Cambridge & Malden (MA)
Colecciones
El modelo FB-7 Series Coils es parte de las colecciones de los siguientes miembros.