Category: Magazines

On the Cover George A. Fathauer’s new book. See p. 6 for details In this issue

Cover illustration from a ’30s Marconi Valves data booklet.   In this issue

A group of Eitel-McCullough stacked-ceramic receiving tubes from the “CD” project of the mid-50’s. Details in the article inside.   In this issue

On the Cover Ross Smith’s display of two-digit tubes in the Equipment Contest at Rochester. See p.2 for details. In this issue

A classically styled promotion poster for the Italian tube maker Zenith, with Factory located in Monza. Beginning about 1929, it made a line of European and American- designed receiving tubes. The original art is 10″ by 15-1/2″. It has been reproduced as a lithograph on steel and in a book on old-time posters.   In...

A set of classic tube-test labels. See the editorial pages for more details.   In this issue

On the Cover Svetlana Engineer wins AWA Tyne award. See p. 1 In this issue

“Cut-away view of a special-quality double triode wth frame-grid construction (E88CC)”, from a Philips promotion for premium “10,000-hour” tubes. The US version is the 6922, a cousin of the 6DJ8 TV-tuner tube now highly respected as an audio type.   In this issue

In honor of the coverage of cavity-magnetron history in this issue, here ia a classic: the 4J50. This device, with its built-in magnet, was designed by Bell Labs for manufacture by Western Electric during WWII, but successful enough to be offered by at least eight other makers in the US, Britian, the Netherlands, France and...

An RCA promo item from 1929 from their dealer publication “Good News” plugging the sales of replacement tubes.   In this issue