everythingRF RF & Microwave Parts Database (h2) - RF Cafe

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

September 1930 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.

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 RADIOCRAFT 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 222 Radio Service Data Sheets as of July 10, 2019.




About RF Cafe
Copyright: 1996 - 2024 Webmaster: Kirt Blattenberger, BSEE - KB3UON
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... All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged. My Hobby Website: AirplanesAndRockets.com Please Support RF Cafe by purchasing my ridiculously low−priced products, all of which I created. RF Cascade Workbook RF & Electronics Symbols for Visio RF & EE Symbols Word RF Workbench (shareware) T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads These Are Available for Free Calculator Workbook Smith Chart™ for Excel

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