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Post subject: 2010-12 "SED" output tubes
Posted: Mon Feb 29, 2016 7:55 am
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Rock Star
Rock Star
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Joined: Sat Jul 03, 2010 2:18 pm
Posts: 6544
Just a heads up warning from some tube carriers, Like Upscale:

"The last batch of these tubes [SV-6L6GC and SV-6550C] to come from the factory prior to shutting down exhibit a "soft vacuum," which causes them to fail prematurely when they are pushed hard."

Apparent, poor QA/QC on the basic vacuum equipment used in tube production.

:(


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