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Kirt Blattenberger - RF Cafe Webmaster

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 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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Follow this "International Kadette Model 1019 A.C. Superhet Radio Service Data Sheet" page on LinkedIn - RF CafeInternational Kadette Model 1019 Superhet Radio Service Data Sheet
January 1938 Radio-Craft

January 1938 Radio-Craft

January 1938 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.

International Kadette Model 1019 on eBay

International Kadette Model 1019 on eBay (still available as of this writing). I saved it in the Wayback Machine in case the page is gone by the time you see this.

For many years I have been scanning and posting "Radio Service Data Sheets" like this one featuring the International Kadette Model 1019 A.C. Superhet Radio in graphical format, and also include some textual content to serve as search engine keyword targets. 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. As shown in the thumbnail image, you can still find many of these old radios in condition ranging from disaster to fully restored. I will keep a running list of all data sheets to facilitate a search.

International Kadette Model 1019 A.C. Superhet Radio Service Data Sheet

International Kadette Model 1019 A.C. Superhet Radio Service Data Sheet, January 1938 Radio Craft - RF Cafe

This diagram of a dual-range A.C. set introduces a new type of quiet A.V.C., a regulator and 2 ballast tubes, and a practical voltage doubler circuit.

This chassis is designed to operate from 110-125 V., 50-60 cycle alternating current power lines. It is a 2-band receiver covering the American broadcast band and police, airport and 49-meter European bands.

ALIGNMENT

Essential Data: The intermediate frequency employed is 448 kc, The standard type of output meter should be used to indicate signal strength. It should be connected from the plate of the 41 tubes to ground. Poor sensitivity may be an indication of incorrectly adjusted I.F. trimmers. Aligning of broadcast band should be done on 1,400, 1,000 and 600 kc.

 Intermediates: To align the LF. circuits, set the signal generator to 448 kc. and feed its modulated signal direct to the antenna. Adjust the 1st LF. transformer trimmers for maximum meter reading. Go over both adjustments at least 3 or 4 times for accuracy. Repeat this process on the 2nd LF. transformer. If adjustments are not made accurately, selectivity will be poor and LF. oscillation may result. Finally, adjust tube trimmer in the tuned wave trap for minimum meter reading.

SHORT-WAVE BAND

Turn the dial to 6,000 kc. and feed a very weak 6,000 kc. modulated signal from your signal generator to the antenna. Adjust the short-wave oscillator trimmer for maximum reading. Then peak antenna coupling condenser to this oscillator setting. Do not attempt to align the low-frequency end of this band. BROADCAST BAND Turn the dial to 1,400 kc. and feed a very weak 1,400 kc. modulated signal to the antenna. Adjust broadcast oscillator trimmer for maximum reading. Then peak broadcast antenna trimmer to this oscillator setting. There is no adjustable padder condenser in this model so resonance on lower frequencies is accomplished 'by bending plates on tuning condenser.

 

 

Posted December 21, 2021(original 10/9/2014)

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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