Category: Magazines

On the Cover The Eimac X-1, a developmental triode from May, 1942, using the bulb and base of a 250T, with new anode and heavier filament taking 25 anps instead of 10.5. In this issue

Hisashi Ohtsuka (right), enjoying his 2009 Schrader Award plaque with Dr Yukawa, museum director of the University of Electro_Communicationon Tokyo. Photos: Hisashi Ohtsuka   In this issue

On the Cover Two historically important cathode-ray tubes: the RCA 906, ca. 1935: and the tektronics T51, ca.1954. See Peter Keller,s synopsis of CRT history in this issue. In this issue

On the Cover The overall assembly drawing for a 36 tube, from RCA Standardizing notice 3-1-236, May 30, 1931 In this issue

On the Cover A variety of ’30’s-vintage tube ans carton labels from RCA In this issue

On the Cover Amperex cover sheet featuring the 8505. In this issue

On the Cover The well reputed EL84/6BQ5 output tube. In this issue

On the Cover On The Cover: A British playing card promoting the Mazda brand. In this issue

On the Cover The classic 2K25 oscillator reflex klystron. In this issue