Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes RF Cascade Workbook RF Stencils for Visio Shapes for Word Thank you for visiting RF Cafe!

The Kadette Jewel Model 40 Chassis 3-Tube
Ultra-Midget Receivers Models 41, 43, 44 and 48
Radio Service Data Sheet
July 1936 Radio-Craft

July 1936 Radio-Craft

July 1936 Radio Craft Cover - RF Cafe[Table of Contents]

People old and young enjoy waxing nostalgic about and learning some of the history of early electronics. Radio-Craft was published from 1929 through 1953. All copyrights are hereby acknowledged. See all articles from Radio-Craft.

At least for now, I am going to only scan and post schematics & parts lists like this one featuring the Kadette Jewel Model 40 Chassis 3-Tube Ultra-Midget Receivers Model 41, 43, 44 and 48 radios in graphical format, rather than run OCR on them to separate the textual content. 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 will keep a running list of all data sheets to facilitate a search.

The Kadette Jewel Model 40 Chassis 3-Tube Ultra-Midget Receivers Models 41, 43, 44 and 48
Radio Service Data Sheet

A.C.-D.C. operation; new type balanced-armature speaker; range, (Size, 5 1/2 x 7 1/2 x 3 3/4 ins.; molded bakelite cases in many colors; 550 to L600 kc.)

The Kadette Jewel Model 40 Chassis 3-Tube Ultra-Midget Receivers Models 41, 43, 44 and 48 Radio Service Data Sheet, July 1936 Radio-Craft - RF Cafe

The circuit of this receiver is of the A.C.­D.C. type, the 12A7 tube, V3, acting as both rectifier and power tube. Voltages are as follows:

These readings are taken with the volume control on full and no-signal input. All voltage readings except the heater taken with a 1,000 ohms-per-volt meter, to chassis. The circuit is one of extreme simplicity (which accounts for the long trouble-free performance to be had). The set runs quite cool due to the fact that the dropping resistor is in the line cord. A magnetic speaker of new construction is employed and will give good service without the need of any adjustments. The case is of solid molded bakelite and may be had in several different colors. The speaker grilles are detachable and are also supplied in several finishes. The set is ideal for the traveler, since it is so small, and a suede carrying case may be obtained for carrying and protection. Since V3 is a dual tube, the set gives a performance equal to those using 4 tubes, resulting in very high sensitivity for a set of this type. To test for alignment, insert a thin strip of mica, bakelite, or celluloid between the plates of the tuning condenser sections. Tune in a signal then open the condenser slightly below the point of resonance. Insertion of the feeler should now increase the signal, and as the feeler is pushed still farther between the plates, the signal should drop off. Correction for incorrect adjustment is made by bending the plate sections at the point of mesh, checking at 1,000 and 550 kc. The trimmer condensers should be set for best gain at 1,500 kc.

 

 

Posted August 27, 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.

Try Using SEARCH to Find What You Need.  >10,000 Pages Indexed on RF Cafe !

Copyright 1996 - 2016
Webmaster:  Kirt Blattenberger, BSEE - KB3UON
Family Websites:  Airplanes and Rockets | Equine Kingdom

All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.