>
>
>Rich said:
>
>> Firstly, I would try to determine if the problem is in the tubes or in
>> the amplifier. To make this determination, I would test the tubes for
>> abnormal leakage. To do this you need a +/- 5kV high-pot tester,
>> current-limited to a couple of hundred uA. . With +5kV on the anode,
>> you should be seeing under 10uA.
>
>Rich,
>What is your reference for this?
>
? Personal experience with 3CX800A7s and the 425.
cheers, Lane
>Ku7i
>
>
>>If the measured leakage decreases when
>> the anode is negative, you could have a bit of gold-sputtering -- which
>> is Not necessarily a fatal condition. Loose gold will definitely mess
>> with grid-current readings.
>> cheers, Sam.
>>
>>
>> - Rich..., 805.386.3734, www.vcnet.com/measures.
>>
>>
>> --
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>>
>
>
>--
>FAQ on WWW: http://www.contesting.com/ampsfaq.html
>Submissions: amps@contesting.com
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>
>
- Rich..., 805.386.3734, www.vcnet.com/measures.
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
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