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Colonial 31 and 32 D.C. Superheterodyne Receiver
Radio Service Data Sheet
September 1930 Radio-Craft

September 1930 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.

The following announcement was posted in the September 1930 edition of Radio-Craft magazine regarding Radio Data Service Sheets:

"We are pleased to announce that RADIO-CRAFT has taken over the subscription list of 'RADIO SERVICE,' formerly published in Dallas, Texas. All subscribers of record to RADIO SERVICE will receive RADIO-CRAFT until the expiration of their subscriptions."

Colonial 31 and 32 D.C.

The Colonial "31 D.C." which has had very wide distribution, incorporates a number of unusual design features. For instance, volume is controlled by varying condenser C4; with the middle plate centered the signal is balanced out. An absorption loop (LI C) improves the tuning characteristic. The cable color code is as follows: 7, yellow; 1, maroon; 5, black; 2, blue; 6, red; 12, gold with black tracer; 9, black with red tracer; 10 red with black tracer; 3, green; 4, 8 and 11 are not used. VI, V2, V3, V4 and VS are '26 tubes; V6, V7, are '71As; while V8 is a 110 V. "miniature base" 15 watt lamp ...

Colonial 31 and 32 D.C. Superheterodyne Receiver Radio Service Data Sheet, September 1930 Radio-Craft

Posted July 4 ,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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Colonial 31 and 32 D.C. Superheterodyne ReceiverRadio Service Data SheetSeptember 1930 Radio-Craft

Colonial 31 and 32 D.C.

Colonial 31 and 32 D.C. Superheterodyne Receiver
Radio Service Data Sheet
September 1930 Radio-Craft