Clarion No. TC-31 5-Tube A.C.-D.C. Superhet.
Radio Service Data Sheet
March 1935 Radio-Craft

January 1939 Radio-Craft

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

I have been scanning and posting Radio Service Data Sheets like this one featuring the Clarion No. TC-31, 5-tube, A.C.-D.C. superheterodyne radio receiver for many years now. 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 usually attempt to find somewhere on the Internet of an actual existing example of the radios, but could not for the Clarion TC-31.

Clarion No. TC-31 5-Tube A.C.-D.C. Superhet. Radio Service Data Sheet

This set is designed for operation on 110 V. A.C. or D.C. lighting lines. If the set does not operate on D.C 'in several minutes reverse the plug. The attached antenna should be laid out on the floor or hung out of a window. It may also be attached to an outside antenna if one is available. No ground is required and no attempt should be made to connect one as this will result in blowing a house fuse.

Service Suggestions

Circuit: The receiver uses a superhet circuit. The tubes used are: type 6C6 as combined oscillator and first-detector; 6D6, I.F. amplifier; 6C6, combined second-detector and first A.F. amplifier; and, 43, output A.F. amplifier.

Aligning the Set: Only in rare cases will it be found necessary to adjust any trimmers. If the volume is low, everything else should be checked before attempting to align the set.

Posted February 2, 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.


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Clarion No. TC-31 5-Tube A.C.-D.C. Superhet.Radio Service Data SheetMarch 1935 Radio-Craft

Clarion No. TC-31 5-Tube A.C.-D.C. Superhet.
Radio Service Data Sheet
March 1935 Radio-Craft