Category: Magazines

On the Cover George Fathauer makes a tubish point at the TCA meeting at Rochester In this issue

On the Cover An oridinary Type 76. In this issue

A celebration of the addition of an LRS Relay and ita AEG amplifier to the museum of the University of Electro_Communications in Chofu City, Tokyo. The celebrents are, left to right, Hisashi Ohtsuka (who assembled the collection), Prof. Yukawa (museum curator, Bengt Svensson (who played a mojor role in having the LRS transferred from the...

Two versions of the Eital-McCullough 4W20,000A power tetrode: at left., an early version (1952), cut open to reveal the “bombardment” cathode; at right, one from 1955. This tube is documented extensively in TC for oct. 2010. A very early bulbedd model, possibly the X486 protype, is illustrated on Norm Wilson’s n6jv.com web site.   In...

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