>
>on 3/3/00 1:06 AM, Ian Roberts at itr@nanoteq.co.za wrote:
>
>> What intrigues me, is that certain amps appear to work for a while, even
>> in hygienic surroundings, then suddenly say "good bye", apparently
>> without good reason.
>> But your reference to the effect of reactance on oscillation might be
>> the clue, especially when one reads reports about deteriorating
>> connectors and water running onto Joe's feet down the coax...
>
>Well, Ian, I think one possible explanation is that the suppressor resistors
>go bad with time. The heating effects caused by the tube, circulating
>current, etc. greatly shortens the lifetime of the resistors from what they
>would be at room. Over time they wear out, and then pow! you end up not
>having a network that is capable of suppressing oscillation.
>
Some people know what to look for and some do not.
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