At the risk of stating the obvious, if the 240 VAC circuit is defective and
possibly arcing, this is a fire hazard and you'd probably be best off not
doing further diagnostic work until an electrician has checked the wiring.
Typically, the wiring at the socket will show charing, although the problem
could be elsewhere. Hopefully, that will fix your problem and you won't have
to ship hardware all over the place.
If he finds nothing, have him put the voltmeter across the power line at
while you duplicate the problem (if that's possible). If the line is
defective, the voltage will fluctuate wildly.
Incidentally, I had a similar problem that was impossible to find for months
and it turned out to be - of all things- the tube. Nobody can explain why,
but that fixed the problem. I mention this just in case you are swapping
the tubes between the two amps (I don't know if they use the same tubes).
Good luck
Ed N1TS
----- Original Message -----
From: "Vic Rosenthal" <vic@rakefet.com>
To: "Thomas Hix" <w4th@hotmail.com>
Cc: <amps@contesting.com>
Sent: Tuesday, August 17, 2004 1:54 AM
Subject: Re: [Amps] Need Diagnostic help
> Thomas Hix wrote:
>
>
> > OK that is 2 different amps that had the same exact symptoms while at my
> > location hooked to my 240 line.......both amps were making the
> > arcing/buzzing sound inside the amp and both were showing a downward
> > deflection on the high voltage meter.......both amps worked wonderfully
> > with no sign of arcing/buzzing and no high voltage meter deflection when
> > hooked up at my friends shop.
>
> OK, you have a bad connection somewhwere in your 240 volt circuit, which
> is loose and arcing. Some component in your amp is buzzing in response
> to the rapidly fluctuating 240 vac -- there's no arc inside the amp, so
> your friend couldn't find any signs of arcing. Maybe even a relay is
> buzzing.
>
> --
> 73,
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco
>
>
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