B-504 battery-line operated
DeWald Radio Mfg. Corp., Pierce Airo Inc.
- Produttore / Marca
- DeWald Radio Mfg. Corp., Pierce Airo Inc.
- Anno
- 1948
- Categoria
- Radio (o sintonizzatore del dopoguerra WW2)
- Radiomuseum.org ID
- 37732
-
- Brand: Pierce Airo
SAMS Photofact 8/48 Folder 4813-9 Set 43
From Canadian eBay seller 11_milehouse.
From Canadian eBay seller 11_milehouse.
From Canadian eBay seller 11_milehouse.
Clicca sulla miniatura dello schema per richiederlo come documento gratuito.
- Numero di tubi
- 4
- Principio generale
- Supereterodina (in generale); ZF/IF 455 kHz; 2 Stadi BF
- N. di circuiti accordati
- 6 Circuiti Mod. Amp. (AM)
- Gamme d'onda
- Solo onde medie (OM).
- Tensioni di funzionamento
- Rete / Batterie (ogni tipo) / 117;4.5;67.5 Volt
- Altoparlante
- AP magnetodinamico (magnete permanente e bobina mobile)
- Materiali
- Plastica o bachelite
- Radiomuseum.org
- Modello: B-504 [battery-line operated] - DeWald Radio Mfg. Corp.,
- Forma
- Apparecchio portatile > 20 cm (senza la necessità di una rete)
- Annotazioni
- Built-in loop antenne as first RF circuit. Selenium rectifier.
- Fonte esterna dei dati
- Ernst Erb
- Fonte dei dati
- Collector's Guide to Antique Radios (6th edition)
- Riferimenti schemi
- Rider's Perpetual, Volume 18 = 1949 and before
- Letteratura / Schemi (1)
- Machine Age to Jet Age II
- Letteratura / Schemi (2)
- Table Top Radios Vol. 4 Stein 2003
- Letteratura / Schemi (3)
- Plastic Radios - The Antique Radio Collectors' Source Book
- Letteratura / Schemi (4)
- Photofact Folder, Howard W. SAMS (Set 43, Date 8/48, Folder 4813-9)
- Altri modelli
-
In questo link sono elencati 445 modelli, di cui 196 con immagini e 346 con schemi.
Elenco delle radio e altri apparecchi della DeWald Radio Mfg. Corp., Pierce Airo Inc.
Discussioni nel forum su questo modello: DeWald Radio Mfg.: B-504
Argomenti: 1 | Articoli: 4
Ok, I pretty much a nubie here folks. I did a search on the forum and I did not see a hit, so I started here. I hope this is correct.
I have a few questions on this 1948 DeWald B-504. I know to replace all the capacitors. I laughed when I Googled the two batteries. I got nothing and it said pretty much that.
I just came across this gem and the 4 1/2 volt battery still read 3.5 vdc. Geeze after some 70 years! I believe these two batteries are original. Im sure no one has been in this radio since it was sold in 1948 best I can tell.
First question, should I replace the selenium rectifier? If so, this is done with a diode and a resistor? What values are these? I read somewhere that these gismos can catch fire?
Secondly, I supose I could come up with a power supply to test the batterys that are not available?
Any hints or kinks that anyone may have would be greatly appriciated.
Thanks.....Justin-
Justin McKeever, 15.Feb.24