B-504 battery-line operated
DeWald Radio Mfg. Corp., Pierce Airo Inc.
- Country
- United States of America (USA)
- Manufacturer / Brand
- DeWald Radio Mfg. Corp., Pierce Airo Inc.
- Year
- 1948
- Category
- Broadcast Receiver - or past WW2 Tuner
- 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.
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 4
- Main principle
- Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)
- Tuned circuits
- 6 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Line / Batteries (any type) / 117;4.5;67.5 Volt
- Loudspeaker
- Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
- Material
- Bakelite or Plastics (type unknown)
- from Radiomuseum.org
- Model: B-504 [battery-line operated] - DeWald Radio Mfg. Corp.,
- Shape
- Portable set > 8 inch (also usable without mains)
- Notes
- Built-in loop antenne as first RF circuit. Selenium rectifier.
- External source of data
- Ernst Erb
- Source of data
- Collector's Guide to Antique Radios (6th edition)
- Circuit diagram reference
- Rider's Perpetual, Volume 18 = 1949 and before
- Literature/Schematics (1)
- Machine Age to Jet Age II
- Literature/Schematics (2)
- Table Top Radios Vol. 4 Stein 2003
- Literature/Schematics (3)
- Plastic Radios - The Antique Radio Collectors' Source Book
- Literature/Schematics (4)
- Photofact Folder, Howard W. SAMS (Set 43, Date 8/48, Folder 4813-9)
- Other Models
-
Here you find 442 models, 195 with images and 343 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from DeWald Radio Mfg. Corp., Pierce Airo Inc.
Collections
The model B-504 is part of the collections of the following members.
Forum contributions about this model: DeWald Radio Mfg.: B-504
Threads: 1 | Posts: 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