International Model 66 and 666 Kadette
6-Tube Superhet Radio Service Data Sheet
April 1936 Radio-Craft

April 1936 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.

International Kadette Model 66 and 666, 6-Tube Superhet Radio (RadioMuseum.org)

This Radio Service Data Sheet covers the International Kadette Model 66 and 666, superheterodyne receiver. Most - if not all - electronics servicemen had subscriptions to these magazines because they were a ready source of not just these service sheets, but because of the extensive articles offering advice on servicing radios and televisions. In fact, many electronics manufacturers had a policy of supplying service data only to bona fide shops. A large list is included at the bottom of the page of similar documents from vintage receiver schematics, troubleshooting tips, and alignment procedures. They were originally published in magazines like Radio-Craft (this April 1936 issue), Radio and Television News, Radio News, etc. I scan and post them for the benefit of hobbyists who restore and service vintage electronics equipment.

Ward 10-Tube All-Wave High-Fidelity Superhet, Series ODM Radio Service Data Sheet

Alignment should be made by use of output meter and service oscillator. Set latter at 448 kc, and attach lead to set antenna connection. Align I.F.T. 1, then I.F.T. 2 for maximum output. Place band switch at broadcast position, turn set to 1,400 kc. and feed a very weak 1,400 kc. signal from service oscillator to antenna. Adjust trimmers on gang condenser for best response. Adjustment at 1,000 and 600 kc. must be made by carefully bending plates of tuning condenser. Socket voltages are as below. Line voltage should be 118 V., and volume control full on. A variation of 10 per cent is allowable. All measurements made from tube prong to circuit ground. No alignment is necessary for the short-wave band since this is accomplished automatically. As a rule poor sensitivity is a sign of incorrect I.F. alignment, which should be carefully checked in such cases.

Posted April 18, 2022
(updated from original post on 6/17/2015)

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.

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 lady's voice announced "You've Got Mail" when a new message arrived...

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International Model 66 and 666 Kadette6-Tube Superhet Radio Service Data SheetApril 1936 Radio-Craft

International Model 66 and 666 Kadette
6-Tube Superhet Radio Service Data Sheet
April 1936 Radio-Craft