Category: Magazines

Home / Magazines
Volume12, Number 4

Vol. 12, No. 4

Part of a fine collection of developmental metal tubes. See inside for more details Photos: Bob Millard.   In this issue

Volume17, Number 6

Vol. 17, No. 6

A family of Philips Innoval tubes – left to right, 6BH5, 6M5, 12AN7, 6N8, and 6AN7. Photo: Daniel Stocks.   In this issue

Volume12, Number 5

Vol. 12, No. 5

Hisashi Ohtsuka inspecting an LRS Realy at the Technical Museum in Stockholm. The tube, and a Telefunken amplifier that uses it, are being loaned to the museum of the University of Electro-Communication in Tokyo. This greatly enhances the excellent tube collection that Ohtsuka donated, and that he continued to support. (See TCA, April 2005, p....

Volume15, Number 3

Vol. 15, No. 3

The Philips EC157 microwave triode, registered in 1963 with the Electronic Industries Association (but not cataloged) by Philips’ subsidiary Amperex. While physically similar to the much earlier “lighthouse” tubes (2C43 etc.) from General Electric, this one is substantially redesigned and is rated at much higher frequency (6GHz).   In this issue

Volume12, Number 6

Vol. 12, No. 6

The front cover of an RCA service-dealer magazine from the mid-Twenties, featuring the “Selling Fool” doll. Graphic: Joe Knight   In this issue