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In Reply to: Back when I was using 6GK5s ... posted by Dave Pogue on April 22, 2007 at 16:40:12:
or another vendor that screens their tubes but perhaps I should have. I bought a dozen Hitachi 6gk5 tubes (very cheap) and threw 8 away because of excessive noise, leaving me with only 4 that worked. On the flip side perhaps I was lucky with the Mullards I got...but I'm only 4 months into their use.
Follow Ups:
I bought mine on Ebay, never had a noisy one. Either I got lucky or the CJ Prem 14 isn't susceptible. Hardly any of my Mullards lasted 4 months in the same unit; tended to flare brightly on start-up which I assume (maybe wrongly) shortened their life.
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