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RCA Victor Model 5M 5-Tube Auto Superhet. Receiver
Radio Service Data Sheet
July 1936 Radio-Craft

July 1936 Radio-Craft

July 1936 Radio Craft Cover - RF Cafe[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.

At least for now, I am going to only scan and post schematics & parts lists like this one featuring the RCA Victor Model 5M 5-Tube Auto Superhet Superheterodyne receiver in graphical format, rather than run OCR on them to separate the textual content. There are still many people who restore and service these vintage radios, and often it can be difficult or impossible to find schematics and/or tuning information. I will keep a running list of all data sheets to facilitate a search.

RCA Victor Model 5M 5-Tube Auto Superhet. Receiver
Radio Service Data Sheet

RCA Victor Model 5M 5-Tube Auto Superhet. Receiver Radio Service Data Sheet, July 1936 Radio-Craft - RF Cafe

RCA Victor Model 5M 5-Tube Auto Superhet. Receiver Radio Service Data Sheet

The complete table of socket voltages for this receiver is included on the small diagram which also shows location of the various trimmers. Voltages below 10 V. should be measured on the 10 V. scale, those between 10 and 50, on the 50 V. scale, and those over 50 on the 250 V. scale of a 1,000 ohm-per-volt meter. The spark plates are specially designed condensers, which act not only to by-pass ignition and other noises, but also allow static charges to leak off to ground. The antenna coil has a molded core, the adjustment of which should not be disturbed. The LF transformers are adjusted by means of movable iron cores, which are reached through the top of the cans and the bottom of the chassis. The antenna lead to the set terminates in a noise filter which cuts off all signals above 1,600 kc., thus eliminating most of the ignition noise which would otherwise enter. The battery input and other leads are also very well filtered to prevent the entrance of noise. The LF. stage is aligned by connecting the service oscillator lead to the cap of V3, and then V2, through a 0.25-mf. condenser. The R.F. section should be aligned at 1,400 and then 600 kc. A 175 mmf. condenser must be connected in series with the antenna lead, and a 50 mmf. condenser from antenna lead to ground.



Posted April 7, 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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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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