>In a message dated 4/11/2003 8:19:42 AM Pacific Daylight Time,
>4z4tl@iarc.org
>writes:
>
>> Is there a way to determine if a 12by7 is operative , out-of-circuit
>> (resistance checks) ?
>>
>
>In my many years of vacuum tube service, the only true test is substitution
>with a known good tube
>K6KWQ
? Quite true, but a precursory check with a high-potential tester can
prevent a tube with a problem from being tried in and damaging the
amplifier.
- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
www.vcnet.com/measures.
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