Sams Photofact

Brand	Model	Set	Notes	Pub year	Schematic Inventory
DEWALD	A502	4-22		1946	Check Stock

Beitman Most Often Needed Radio Diagrams

Brand	Model	Volume	Page	Pub year
DeWald Radio	A502	6 (1946)	32	1946

Rider Perpetual Troubleshooter's Manuals

Brand	Model	Volume	Page	Pub year
DeWald Radio Mfg. Co.	A-502	15	1	1946

The Michigan Vintage Electronics Club has a "garage sale" event during Plymouth, MI's Old Village Yard and Trunk Sale, April 26 8am-3pm. Located on Mill St near the RR tracks.
The next Vintage Electronics Expo will be on Saturday, October 4, 2025, 9 am to 3 pm in partnership with The Kalamazoo Hamfest.
at the Kalamazoo County Expo Center, 2900 Lake St., Kalamazoo, MI