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!

Silvertone "F," "FF," "G," "H," and "J" Radio Service Data Sheet
May 1931 Radio-Craft

May 1931 Radio-Craft

May 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.

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. A Google search for a photo or advertisement of the Silvertone "F" and others in this series did not turn up anything. If you have one, please let me know where to find it. There are 187 Radio Service Data Sheets as of May 2, 2017.

Silvertone "F," "FF," "G," "H," and "J" Radio Service Data Sheet

Silvertone "F," "FF," "G," "H," and "J" Radio Service Data Sheet, May 1931 Radio-Craft - RF CafeThe Silvertone, it will be remembered, is the trade name of a line of radio receivers sold by Sears, Roebuck & Co., Chicago, Ill. The "Model FF" and "J" are two of the older sets dating back to 1926, which were manufactured for this company by King Mfg. Co., Buffalo, N. Y.

These two complete diagrams, shown below, have been selected as representative of the circuits followed in the following models: "F," "FF," "G," "H," "J." A few words will serve to distinguish them:'

The "Model F" Silvertone radio set is a 5-tube receiver using four '01A's and a power rube which is either a '12A or a '71A. It is a battery set of the neutrodyne type, with single control. The grid condenser has a value of .00015-mf.; and the grid leak of 3 megs. The detector plate by-pass capacity is .006·mf. The detector grid leak does not shunt the grid condenser, but returns directly to the positive side of the detector filament; and between this point and the "A" supply lead is a 2-ohm resistor. This detector filament lead and the positive filament leads of the two audio tubes connect to a 1-ohm resistor; which is also wired to the "A+" post, as well as a 10-ohm rheostat to complete the positive "A" circuit of the two R.F. tubes. This rheostat is the volume control. The off-on switch is in the "A-" lead, which is grounded. The R.F. tube circuits are designed to operate at 90 volts on the plate. The first and the second audio stages have independent "B" and "C" supply leads. The reproducer connects directly in the plate circuit of the last tube.

 

 

Posted May 2, 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
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 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:
 AirplanesAndRockets.com

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

height-line