Data is the plural of datum. A datum is a statement accepted at face value (a "given"). A large class of practically important statements are measurements or observations of a variable. Such statements may comprise numbers, words, or images.

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.
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.
Meta Description: [ Specializes in Antique Radio Schematics and Capacitors. Carries antique radio
schematic diagrams and electronic circuit service information for American, Canadian and
European antique radios. ]
Bob's Antique Radios and Electronics - Sales of restoration supplies and schematics for vintage radios and juke boxes. Located in La Grange Park, Illinois.
500
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.
Transistor Radios - Eric Wrobbel's illustrated guides, books, and videos for transistor radio collectors.
Meta Description: [ Excellent pictures and info on vintage transistor radios, crystal radios, and other collectible radio items. Unique books by Eric Wrobbel. ]
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