Thread: "Audio" Valves
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Old 17th Feb 2019, 6:57 pm   #63
emeritus
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Join Date: Jan 2012
Location: Brentwood, Essex, UK.
Posts: 5,316
Default Re: "Audio" Valves

Not all NOS CV valves are necessarily genuine. One of the old hands at GEC mentioned that they had once had a number of CV valves returned under warranty that had turned out to be fakes. MOD had bought them cheaply from a dealer rather than directly from Marconi. The experts at Marconi could tell that they had actually been made in Russia, I think by Svetlana, without needing to dismantle the valves, by the distinctive markings made by the crimp tools that were clearly visible though the envelope. They could tell from these exactly which production line they had been made on. Naturally, they were not replaced for free!

Last edited by emeritus; 17th Feb 2019 at 7:11 pm.
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