Personally.....
I would not be squirting anything of a dubious conductive nature inside
a hot valve linear amplifier unless I was well insured and well
insulated and had a non conductive body...
Paul
In message <3A967D11.67BC@infoave.net>, Bob & Linda McGraw K4TAX
<RMcGraw@InfoAve.Net> writes
>
>Yes, I agree that an upward power drift is most unusual.
>
>As to finding the problem, I've found that cooling the component with a
>can of cool spray is more accurate than a blast of hot air.
>
>73
>Bob K4TAX
>
>Ian White G3SEK wrote:
>>
>> Pete Smith wrote:
>> >
>> >At 11:22 AM 2/22/01 -0800, dan hearn wrote:
>> >>
>> >>Another thought: The problem seems to be heat related. Create a source
>> >>of hot air which can be directed on various components while the amp is
>> >>creating dots from your keyer into a dummy load.
>> >
>> >An easier alternative might be to provoke the amp into the beginning of the
>> >runaway process and then use one of the available cooling spray can
>> >products to cool components till you find the one that reverses the runaway.
>> >
>>
>> W0YR will be off the list for a few weeks, so maybe we have to leave it
>> until he can make some more tests.
>>
>> The real puzzle is that the RF output drifts UPwards, which is quite
>> unusual.
>>
>> 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
>> 'In Practice' columnist for RadCom (RSGB)
>> http://www.ifwtech.com/g3sek
>>
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>
>
>
>--
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>
>
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