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![]() "Theo" wrote in message ... Regarding the "all metal" tubes series by RCA, can anyone tell me if there was ever a metal version of the 6SN7? I cannot find any reference on the web. Any help would be greatly appreciated. AFAIK no metal 6SN7 tubes were ever made. Metal tubes were announced about 1935. The idea was that they were self-shielding. For a time the use of these tubes in radio sets was advertised as meaning they were the most up to date designs. In comparision to glass envelope equvalent tubes metal tubes generally have slightly higher inter-electrode capacatance and also sometimes had problems with sealing. -- --- Richard Knoppow Los Angeles, CA, USA -- Posted via a free Usenet account from http://www.teranews.com |
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