Search RFCafe.com                           
      More Than 18,000 Unique Pages
Please support me by ADVERTISING!
Serving a Pleasant Blend of Yesterday, Today, and Tomorrow™ Please Support My Advertisers!
   Formulas & Data
Electronics | RF
Mathematics
Mechanics | Physics
     AI-Generated
     Technical Data
Pioneers | Society
Companies | Parts
Principles | Groups


 About | Sitemap
Homepage Archive
        Resources
Articles, Forums Calculators, Radar
Magazines, Museum
Radio Service Data
Software, Videos
     Entertainment
Crosswords, Humor Cogitations, Podcast
Quotes, Quizzes
   Parts & Services
1000s of Listings
 Vintage Magazines
Electronics World
Popular Electronics
Radio & TV News
QST | Pop Science
Popular Mechanics
Radio-Craft
Radio-Electronics
Short Wave Craft
Electronics | OFA
Saturday Eve Post

Software: RF Cascade Workbook
RF Stencils for Visio | RF Symbols for Visio
RF Symbols for Office | Cafe Press
Espresso Engineering Workbook

Aegis Power  |  Alliance Test
Centric RF  |  Empower RF
ISOTEC  |  Reactel  |  RFCT
San Fran Circuits

TotalTemp Technologies (Thermal Platforms) - RF Cafe

Innovative Power Products Passive RF Products - RF Cafe

LadyBug RF Power Sensors

Please Support RF Cafe by purchasing my  ridiculously low-priced products, all of which I created.

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

Anatech Electronics RF Microwave Filters - RF Cafe

RCA-Victor Radiola "Superette" Model R7 Superheterodyne Radio Service Data Sheet

August 1931 Radio-Craft

August 1931 Radio-Craft

August 1931 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.

RCA-Victor Radiola "Superette" Model R7 (radiomuseum.org) - RF CafeThis Radio Service Data Sheet for the RCA-Victor Radiola "Superette" Model R7 Superheterodyne was published in the August 1931 issue of Radio-Craft magazine. The Model R7 is a tabletop, or "mantel," radio set that is the first of its kind for RCA-Victor. It is fairly large at 14 x 19 x 10 inches, and weighs 37 pounds, per data on the RadioMuseum.org website.

RCA-Victor Radiola "Superette" Model R7 Superheterodyne

The circuit of this receiver is of particular interest, as being the first of the mantel radio sets brought out by these companies. It is seen, by reference to the diagram below, that this superheterodyne uses a limited number of tubes, in the following manner: One stage of signal-frequency R.F., V1, using the new type '35 variable-mu tube; a type '27 as oscillator, V2; a '24 screen-grid first-detector V3; a type '35 variable-mu first stage of I.F. amplification, V4; a type '27 power second detector, V5; push-pull '45's, V6, V7, in the power A.F. circuit; and the usual '80 rectifier V8.

RCA-Victor Radiola "Superette" Model R7 Superheterodyne Radio Service Data Sheet, August 1931 Radio-Craft - RF Cafe

The resistance values of the choke coils and transformers in this model chassis are shown in parentheses in the diagram (Fig. I); other constants are given below.

 

 

Posted October 5, 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 227 Radio Service Data Sheets as of December 28, 2020.

Anatech Electronics RF Microwave Filters - RF Cafe
Windfreak Technologies Frequency Synthesizers - RF Cafe

ConductRF Phased Matched RF Cables - RF Cafe

Copper Mountain Technologies (VNA) - RF Cafe