Emerson Models 501, 502, 504 Schematic & Parts List
November 1947 Radio News

December 1947 Radio & Television 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.

Sam's PhotoFact Emerson Models 501, 502, 504 - RF Cafe This is the schematics and parts list set for vintage Emerson vacuum tube radio models 501, 502, and 504, as they appeared in the November 1947 issue of Radio News magazine. I scan and post these for the benefit of hobbyists and historians seeking such information. As time goes by, there is less and less likelihood that records of these relics from yesteryear's archives will be made available. To the left is the cover page for the Sam's PhotoFact data packet. To the lower right are example of the Emerson Model 502 that appeared on eBay at one time. As with all historical information, it takes someone with a personal interest in preserving the memories in order to fulfill the mission, and I am glad to be a small part of that cadre.

Emerson Models 501, 502, 504 Schematic & Parts List

Emerson Model 502
(eBay images)

Emerson Models 501, 502, 504 Schematic

Emerson Models 501, 502, 504 Parts List

Posted February 24, 2023
(updated from original post on 2/10/2016)

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.

Exodus Advanced Communications Best in Class RF Amplifier SSPAs - RF Cafe

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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 tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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TotalTemp Technologies (Thermal Platforms) - RF Cafe

Emerson Models 501, 502, 504 Schematic & Parts List November 1947 Radio News

Emerson Models 501, 502, 504 Schematic & Parts List
November 1947 Radio News