Antique Radio Grille Cloth 
A source of reproduction grille cloth for popular radio models made from 1920 through to 1940. They also provide links, tips, historical notes, and artwork of interest to restorers and collectors.
http://www.grillecloth.com/Antique Radio Schematics - JustRadios
Sells schematics and service information for American, Canadian, and European vintage tube radios. They also offer high-voltage electrolytic and metalized polyester-film (Mylar) capacitors for antique radio restoration projects, along with a list of tips about capacitors.
http://www.justradios.com/
Bob's Antique Radios and Electronics
Sales of restoration supplies and schematics for vintage radios and juke boxes. Located in La Grange Park, Illinois.
http://www.radioantiques.com/
Canadian Radio Circuits Database
CD-ROM with over 900 pages of high-resolution scans of schematic diagrams and service data for home and auto radios from 1938 to 1948. Files are in platform-independent html format, viewable with a web browser.
http://artofhacking.com/radio.htm
Transistor Radios
Eric Wrobbel's illustrated guides, books, and videos for transistor radio collectors.
http://www.ericwrobbel.com/
