Category: Magazines

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

On the Cover “Early DeForest Audion”. In this issue

“Dan’s Used Curve-Tracer Lot” -Daniel Schoo, perhaps better known for herioc radio restorations in the pages of Antique Radio Classified, now appears in our pages with a feature on adapting tracers intended for solid-state devices to use with tubes. Photo: Daniel Schoo.   In this issue

Inside a Western Electric ES-9709B oak-cabinet repeater “gain Element” of the type used at Brushton outside Pittsburgh on the 1914 transcontinental line. (For a front view, see inside this issue, or p. 93 of Tyne’s Saga of the Vacuum Tube.) The pair of Everready multicell dry batteries labeled “C Battery” may reflect the first commercial...

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...