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Old 13th Sep 2021, 7:07 am   #15
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Default Re: Valve testers & 'soak' testing.

In the case of what Tek and others did, it's a process to weed out infant mortalities. New valves with a defect which limits them to a short life, but which doesn't spoil the parameters in the beginning, say like a poor seal on a pin, or one not outgassed properly.

Much of what they did wasn't selecting valves for better parametric performance, just improving the confidence they could have in their longevity.

David
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