Siemens V 140/8G Kenotron











     14” (35 cms) long. Early oil immersed kenotron. Dating probably to the thirties. Note the shape of this kenotron, inspired from that of earlier air-cooled kenotrons and early hot cathode x-ray tubes. Its shape is equally reminiscent of the early PANTIX, the first rotating disc-anode x-ray tube introduced by Siemens in 1933.




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