Fenman 2
Pye Ltd., Radio Works; Cambridge
- Produttore / Marca
- Pye Ltd., Radio Works; Cambridge
- Anno
- 1955
- Categoria
- Radio (o sintonizzatore del dopoguerra WW2)
- Radiomuseum.org ID
- 102299
Clicca sulla miniatura dello schema per richiederlo come documento gratuito.
- Numero di tubi
- 11
- Principio generale
- Supereterodina (in generale); ZF/IF 470 kHz
- Gamme d'onda
- Onde medie (OM), lunghe (OL) e MF (FM).
- Tensioni di funzionamento
- Alimentazione a corrente alternata (CA) / 200-250 Volt
- Altoparlante
- AP magnetodinamico (magnete permanente e bobina mobile)
- Materiali
- Mobile in legno
- Radiomuseum.org
- Modello: Fenman 2 - Pye Ltd., Radio Works;
- Forma
- Soprammobile basso, con andamento orizzontale (grosse dimensioni).
- Bibliografia
- -- Original-techn. papers.
- Autore
- Modello inviato da Peter Hoddow. Utilizzare "Proponi modifica" per inviare ulteriori dati.
- Altri modelli
-
In questo link sono elencati 628 modelli, di cui 484 con immagini e 342 con schemi.
Elenco delle radio e altri apparecchi della Pye Ltd., Radio Works; Cambridge
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Discussioni nel forum su questo modello: Pye Ltd., Radio: Fenman 2
Argomenti: 1 | Articoli: 4
I have just finished uploading the schematics for the Pye FenMan 2, prompted by a friend purchasing an example of this radio and needing the service information for it.
Whilst copying it and studying the FM tuner circuit, which is rather different from the typical double-triode arrangement used in many sets, I noticed that there was no immediately obvious arragement for coupling the oscillations from the triode section of the ECF80 into the pentode section. I assume that there is an internal shield between the two sections and the two sections are electrically isolated, so how does it work? I did wonder if the RF choke in the decoupling of the screen grid of the ECF80 had any bearing on the operation of the mixer? In some television tuners a small value of capacity (ca. 2pF) couples the two sections. Am I missing something obvious here?
I have included an extract of the circuit below, if anyone needs the circuit values I can add those later. All your thoughts are gratefully received!
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Whilst copying it and studying the FM tuner circuit, which is rather different from the typical double-triode arrangement used in many sets, I noticed that there was no immediately obvious arragement for coupling the oscillations from the triode section of the ECF80 into the pentode section. I assume that there is an internal shield between the two sections and the two sections are electrically isolated, so how does it work? I did wonder if the RF choke in the decoupling of the screen grid of the ECF80 had any bearing on the operation of the mixer? In some television tuners a small value of capacity (ca. 2pF) couples the two sections. Am I missing something obvious here?
I have included an extract of the circuit below, if anyone needs the circuit values I can add those later. All your thoughts are gratefully received!
Mike Izycky, 03.Aug.07