ConductRF Phased Matched RF Cables - RF Cafe

BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Windfreak Technologies SynthHD PRO - RF Cafe

Admiral Model 7C64 Schematic & Parts List
February 1948 Radio News Article

February 1948 Radio News Cover - RF Cafe

[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio & Television News, published 1919-1959. All copyrights hereby acknowledged.

This 'drive-by' schematic and parts list for the Admiral Model 7C64 vacuum tube radio appeared in the February 1948 issue of Radio News magazine. I refer to it as 'drive-by' because there was no description or maintenance verbiage provided. You might not expect from the relatively simple circuit that the entire Model 7C64 was mounted in a multi-sectioned wooden cabinet that included a phonograph. The thumbnail at the left is from the RadioMuseum.org website - a great source for research on vintage vacuum tube radios.

Admiral Model 7C64

Circuit Page header from Radio News magazine - RF Cafe

Admiral Model 7C64 Schematic

Admiral Model 7C64 Parts List

Posted May 29, 2017

Radio Service Data Sheets

These schematics, tuning instructions, and other data are reproduced from my collection of vintage radio and electronics magazines. As back in the era, similar schematic and service info was available for purchase from sources such as SAMS Photofacts, but these printings were a no-cost bonus for readers. There are 227 Radio Service Data Sheets as of December 28, 2020.

RIGOL Technologies (test equipment) - RF Cafe

RF Electronics Shapes, Stencils for Office, Visio by RF Cafe

Admiral Model 7C64 Schematic & Parts List February 1948 Radio News Article

Admiral Model 7C64 Schematic & Parts List
February 1948 Radio News Article