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A-502

A-502 ; DeWald Radio Mfg. (ID = 93702) Radio
 
A-502 ; DeWald Radio Mfg. (ID = 455483) Radio
 
A-502 ; DeWald Radio Mfg. (ID = 455484) Radio
 
A-502 ; DeWald Radio Mfg. (ID = 455485) Radio
 
A-502 ; DeWald Radio Mfg. (ID = 455486) Radio
 
A-502 ; DeWald Radio Mfg. (ID = 455487) Radio
A-502 ; DeWald Radio Mfg. (ID = 551975) Radio A-502 ; DeWald Radio Mfg. (ID = 50205) Radio
A-502 ; DeWald Radio Mfg. (ID = 266660) Radio A-502 ; DeWald Radio Mfg. (ID = 551972) Radio
A-502 ; DeWald Radio Mfg. (ID = 551973) Radio A-502 ; DeWald Radio Mfg. (ID = 551976) Radio
A-502 ; DeWald Radio Mfg. (ID = 711735) Radio A-502 ; DeWald Radio Mfg. (ID = 1065187) Radio
A-502 ; DeWald Radio Mfg. (ID = 1397934) Radio A-502 ; DeWald Radio Mfg. (ID = 1397935) Radio
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A-502 ; DeWald Radio Mfg. (ID = 551975) Radio
DeWald Radio Mfg.: A-502 [Radio] ID = 551975 654x600
Select picture or schematic to display from thumbnails on the right and click for download.
For model A-502, DeWald Radio Mfg. Corp., Pierce Airo Inc.:
USA Dewald A502 right side view courtesy of Harry Merkel
 
Country:  United States of America (USA)
Manufacturer / Brand:  DeWald Radio Mfg. Corp., Pierce Airo Inc.
Brand
 
Pierce Airo
Year: 1946 Type: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: 12SA7 12SK7 12SQ7 50L6GT 35Z5GT
Principle Super-Heterodyne (Super in general); ZF/IF 455 kHz; 2 AF stage(s)
Tuned circuits 6 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage AC/DC-set / 105 - 125 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm
Power out
from Radiomuseum.org Model: A-502 - DeWald Radio Mfg. Corp.,
Material Catalin (a brand name for a thermosetting polymer popular in the 1930s and 1940s - a phenol formaldehyde resin - like Bakelite, but a two-stage process with a lot of work afterwards).
Shape Tablemodel, low profile (big size).
Notes The DeWald Model A-502 is an AC/DC operated AM Superheterodyne Receiver with self contained Loop Antenna. Available in five color combinations.
Collectors' prices  
External source of data Ernst Erb
Source of data Collector's Guide to AR4.Ed.,Bunis, tube
Circuit diagram reference Rider's Perpetual, Volume 15 = 1947 and before
Mentioned in The Radio CollectorGrinder, 1995 (Beitman Radio Diagrams 1949)
Literature/Schematics (1) Photofact Folder, Howard W. SAMS (Date 9-46, Folder 464-22)
Literature/Schematics (2) Radio Retailing (R & Television R.) (January 1946 page 41.)

All listed radios etc. from DeWald Radio Mfg. Corp., Pierce Airo Inc.
Here you find 422 models, 183 with images and 324 with schematics for wireless stes etc. French TSF for Télégraphie sans fil.


  
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