EDN

What’s It Worth: Early Components — Rectifiers

Converting ac to dc has been accomplished by several different types of rectifiers through the years. Here are a few of the more common types of rectifiers used in the past 100 years. Mercury arc ...
The New York Times

NEW TUBES INCREASE VARIETY OF "B" BATTERY ELIMINATORS; Latest Rectifier Tube Based Upon New Principle of Insulation Has Long Life -- Helium Gas Used Inside the Bulb

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...
Hackaday

Vacuum Tube Repair After A Spectacular Failure

[Eric] has an Atwater Kent 55C AM radio from the early 1900’s. He’s been trying to restore the radio to proper working condition. His most recent pain has been with the rectifier tube. The tube is ...
insider.si.edu

Majestic "Super Power" rectifier tube

A 4-pin plastic base with brass pins, two cylindrical electrodes mounted side-by-side below a metal cube. S-shaped envelope. Cold-cathode rectifier in original box with data sheet. Stamped on base: ...