Thank you for visiting RF Cafe! 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 Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Homepage Thank you for visiting RF Cafe!

RCA Victor Model M109 "De Luxe" 7-Tube Auto-Radio Receiver
Radio Service Data Sheet
June 1936 Radio-Craft

June 1936 Radio-Craft

June 1936 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.

I could not find any photographs of an RCA Victor Model M109 automobile radio. You might think that with it being a 'De Lux' model that there would be plenty of examples around, but evidently not. The Radio Service Data Sheet was part of a group of six such instances that appeared in the June 1936 issue of Radio-Craft magazine.

RCA Victor Model M109 "De Luxe" 7-Tube Auto-Radio Receiver
Radio Service Data Sheet

RCA Victor Model M109 "De Luxe" 7-Tube Auto-Radio Receiver Radio Service Data Sheet, June 1936 Radio-Craft - RF Cafe(Class B output; input noise filter; 2 units; tone control; 540 to 1,600 kc.)

The required operating voltages of this receiver are all shown on the detail drawing. All values are measured to ground, and most of them may be made with an ordinary high resistance meter, while a few must be made with a V.T. voltmeter. The battery input voltage is 6.6 V. and volume control at max. with no input signal. Alignment frequencies are: 175 kc. for I.F., 1,400 kc, for R.F. and for osc. trimming, and 600 kc. for osc. padding. The power output is 3.5 W. undis­torted, and 6 W. maximum, and current consumption is 7.2 A.

The grounding of the outer end of the antenna lead-in shield is very critical, since interference may be minimized by selecting the proper point of attachment to the car frame, the point having to be found by ex­periment.



Posted June 20, 2017

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 219 Radio Service Data Sheets as of November 15, 2017.


RF Cafe Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
Kirt Blattenberger,

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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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:

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !