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!

Stewart-Warner Model 03-5A1 to 03-5A9 (Chassis 03-5A) Senior Varsity Radio Service Data Sheet
November 1939 Radio-Craft

November 1939 Radio-Craft

November 1939 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.

Stewart-Warner Model 03-5A Senior Varsity Radio ( - RF CafeI have been scanning and posting Radio Service Data Sheets like this one featuring the Stewart-Warner Model 03-5A Senior Varsity Radio receiver for many years now. 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. The thumbnail image of the Stewart-Warner Model 03-5A Senior Varsity Radio came from the website.

Stewart-Warner Model 03-5A1 to 03-5A9 (Chassis 03-5A) Senior Varsity Radio Service Data Sheet

Stewart-Warner Model 03-5A1 to 03-5A9 (Chassis 03-5A) Senior Varsity Radio Service Data Sheet, November 1939 Radio-Craft - RF CafeAlignment Procedure

An output meter and an accurately calibrated signal generator are required.

(1) Connect the output meter across the voice coil; or, using a con­denser in series, connect between the plate of the 35L6GT output tube and "B-" as shown on the voltage chart. The more sensitive type should be connected across the voice coil.

(2) Connect the ground lead of the signal generator to the "B-" lug (shown on the voltage diagram) through a 0.25-mf. condenser and keep it connected in this manner throughout the entire alignment procedure. Failure to do this may have serious results, as one side of the power line may be grounded in the signal generator, or bum may be encountered.

(3) Turn the volume control to the maximum volume position and leave it in this position throughout the entire alignment pro­cedure.

(4) To Calibrate the Dial - Remove the chassis from the cabinet and set it on a fiat surface (insulated from ground). With the gang in full mesh, the last dial division (just below 55) on the low-frequency end, should be exactly 4% inches above the table surface. If this is not the case, release the set­screw in the collar which connects the gang condenser shaft with the tuning unit, and holding the gang in full mesh, turn the dial until the last division is exactly 4% inches above the table surface. Now re-tighten the setscrew in the collar. The 4% inch division on the ruler (when measured vertically from table



Posted April 12, 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 !