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Old 22nd Apr 2018, 4:39 pm   #13
ionburn
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Join Date: Dec 2014
Location: Lincoln, Lincolnshire, UK.
Posts: 583
Default Re: DC heater supply valve tester.

Quote:
Internal shorting is rare in my experience, a tube should be rejected for shorts before HT is applied.
I would agree, in practice, but in principle a complete tester should test for all problems, not require pre-testing before use.
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