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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 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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Zenith 5-Tube Triple-Wave Superhet. Chassis nos. 5508 and 5509
Radio Service Data Sheet
June 1935 Radio-Craft

June 1935 Radio-Craft

[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio-Craft, published 1929 - 1953. All copyrights are hereby acknowledged.

Operating voltages for this receiver are measured as follows. Line voltage, 112 V antenna and ground disconnected; measurements taken to ground; G1 is control-grid, G2-screen-grid, G3-suppressor.grid. (The output of V5 is not given.) Alignment data: For I.F. adjustment, connect service oscillator to G1 of V1, and ground. Align C band at 15 megacycles (service oscillator connected to antenna and ground posts); align A band at 600 and 1,400 kc.

Zenith 5-Tube Triple-Wave Superhet. Chassis nos. 5508 and 5509

Posted June 9, 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.

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Zenith 5-Tube Triple-Wave Superhet. Chassis nos. 5508 and 5509 Radio Service Data SheetJune 1935 Radio-Craft

Zenith 5-Tube Triple-Wave Superhet. Chassis nos. 5508 and 5509

Zenith 5-Tube Triple-Wave Superhet. Chassis nos. 5508 and 5509
Radio Service Data Sheet
June 1935 Radio-Craft