Search RFC: |                                     
Please support my efforts by advertising!
About | Sitemap | Homepage Archive
Serving a Pleasant Blend of Yesterday, Today, and Tomorrow™
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
Please Support My Advertisers!

Aegis Power | Centric RF | RFCT
Alliance Test | Empower RF
Isotec | Reactel | SF Circuits

Formulas & Data

Electronics | RF
Mathematics
Mechanics | Physics


Calvin & Phineas

Resources

Articles, Forums, Radar
Magazines, Museum
Radio Service Data
Software, Videos


Artificial Intelligence

Entertainment

Crosswords, Humor Cogitations, Podcast
Quotes, Quizzes

Parts & Services

1000s of Listings

        Software: RF Cascade Workbook | RF Symbols for Office
RF Symbols for Visio | RF Stencils for Visio
Espresso Engineering WorkbookCafe Press
Exodus Advanced Communications Best in Class RF Amplifier SSPAs - RF Cafe

Stenode Corporation of America Advertisements
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.

Stenode tubes were a big deal in the early 1930s, and were deemed capable of changing fundamentally the way high selectivity receivers and transmitter preamplifiers would be designed. History had other plans for RF circuit design. Note that both advertisements include the signature of Stenode tube inventor Dr. James Robinson. The Stenode's success was dependent upon being able to design a receiver circuit with the ability to "recreate" sidebands from the carrier. That presents a dilemma mathematically since the information in an ideal AM scheme is contained entirely in its sidebands. If the sidebands are removed, that information is lost forever unless it is present somewhere else, like on the carrier itself, which means pure amplitude modulation is not occurring. It is commonplace to recover a suppressed carrier from the sideband(s), but recovering the sidebands from a pure sinewave carrier is impossible. See articles Stenode's Selectivity Revolutionary and The Stenode Radiostat System.

Stenode Corporation of America Advertisements

Stenode Corp. of America Ad on Page 109, August 1931 Radio-Craft - RF Cafe

Stenode Corp. of America Ad on Page 109

Stenode Corp. of America Ad on Page 113, August 1931 Radio-Craft - RF Cafe

Stenode Corp. of America Ad on Page 113

 

 

Posted August 7, 2023
(updated from original post on 11/18/2015)

Exodus Advanced Communications Best in Class RF Amplifier SSPAs - RF Cafe