FB-7 Series Coils
National Company; Cambridge & Malden (MA)
- Produttore / Marca
- National Company; Cambridge & Malden (MA)
- Anno
- 1933–1936
- Categoria
- Parte di radio (ma non modulo a sè stante)
- Radiomuseum.org ID
- 286307
-
- alternative name: National Toy Co.
- Brand: Thrillbox
National FB-7 coil set in original box
National FB-7 coils in original box
- Gamme d'onda
- Gamme d'onda nelle note.
- Tensioni di funzionamento
- Alimentazione non richiesta
- Altoparlante
- - - Nessuna uscita audio.
- Materiali
- Speciale materiale, descritti nelle note.
- Radiomuseum.org
- Modello: FB-7 Series Coils - National Company; Cambridge &
- Forma
- Diverse forme (descritte nelle note).
- Annotazioni
-
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
- Prezzo nel primo anno
- 10.00 USD
- Bibliografia
- National Catalog No. 220 - 1933
- Autore
- Modello inviato da Wayne Childress. Utilizzare "Proponi modifica" per inviare ulteriori dati.
- Altri modelli
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In questo link sono elencati 446 modelli, di cui 285 con immagini e 189 con schemi.
Elenco delle radio e altri apparecchi della National Company; Cambridge & Malden (MA)
Collezioni
Il modello FB-7 Series Coils fa parte delle collezioni dei seguenti membri.