Search RFC: |                                  
Please support my efforts by ADVERTISING!
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

Formulas | Data

Electronics | RF
Mathematics
Mechanics
Physics


Calvin & Phineas

kmblatt83@aol.com

Archive | Sitemap

Resources

Articles | Radar
Cogitations
Magazines | AI
RF Museum
Software | Videos
Radio Service
Tech Notes

Entertainment

Crosswords
Humor | Podcasts
Quotes | Quizzes
Tech Comics

Parts | Services

1000s of Listings


About RF Cafe

Software: RF Cascade Workbook | RF Symbols for Office | RF Symbols & Stencils for Visio | Espresso Workbook
Please Support My Advertisers!
Aegis Power | Centric RF | RFCT
Empower RF | Reactel | SF Circuits

Alliance Test | Isotec
LadyBug Technologies-LBSF09A Power Sensor - RF Cafe - RF Cafe

Johanson Dielectrics Thin Film Substrates - RF Cafe

Tennode RF Connectors and Cables - RF Cafe
Innovative Power Products (IPP) CoolChips - RF Cafe



Anatech Electronics RF & Microwave Filters - RF Cafe

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

Espresso Engineering Workbook

What's Old
February 1963 Radio-Electronics

minimum height spacer

February 1963 Radio-Electronics

February 1963 Radio-Electronics Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio-Electronics, published 1930-1988. All copyrights hereby acknowledged.

Have you heard of Douglas McDonald Perham and his Cavalcade of Electronics? Mr. Perham, born on May 22, 1885, in Duarte, California, was a trailblazer in the development of early radio and electronic technologies. His life and work not only advanced the fields of communication and electronics but also laid the foundation for preserving the history of these transformative technologies. Growing up in Southern California during the late 19th century, Perham developed an early fascination with electricity and mechanics. This passion led him to pursue studies in electrical systems during a period when wireless communication was emerging as a revolutionary technology. His natural aptitude for engineering and his hands-on experimentation with early electrical devices positioned him to play a pivotal role in the industry. In 1905, Perham began his professional career at the Federal Telegraph Company (FTC) in Palo Alto, California. FTC was instrumental in advancing long-distance wireless communication, particularly through its use of the Poulsen arc transmitter.

What's Old

Collection of many early mercury rectifiers - RF Cafe

A collection of many early mercury rectifiers. In top row, partially hidden by cabinet upright, is a three-part rectifier patented by Steinmetz in 1915.

Evidence in a patent suit to show that the Heintz-Kaufman circuit - RF Cafe

This exhibit was built by Ralph Heintz in 1928. It was to be used as evidence in a patent suit to show that the Heintz-Kaufman circuit was not the same as de Forest's and that at least four other researchers had produced oscillations with a three-element tube before de Forest.

By Dick Barrett

All the items shown are exhibits at the Cavalcade of Electronics, a collection of electronic equipment housed in one wing of the Perham Foundation's exhibit at New Almaden, California. A number of other exhibits appeared on page 35 of the August 1962 issue.

Original de Forest triode was made in 1906 - RF Cafe

This original de Forest triode was made in 1906. De Forest wrote in a letter in 1959: "Among the really rare relics you will see there [Perham Foundation exhibit] is one of the original three-electrode cylindrical-shaped tubes with a screw base."

Douglas Perham holds early Farnsworth CRT - RF Cafe

Douglas Perham holds early Farnsworth CRT. It was fabricated from a chemist's flask, the fluorescent screen being painted on the bottom and the electron gun welded into the neck.

everythingRF AI Artificial Intelligence Client - RF Cafe