"Pooh Bear" wrote in message
...


Ron wrote:

ian field wrote:

(snip)

Plug the cable into the amp and instead of plugging the other end into
the
guitar - short the tip to the body & see if the hum stops.

Hmm, actually that makes the hum worse.

The amp's faulty in that case.

Graham


It's hard to see in what way the amp could actually be faulty, though, given
that Ron said that the guitar is perfectly clean and correctly amplified. If
the cable is poor quality, with a less than adequate shield, shorting inner
to shield at the remote end, could be just turning it into a long single
turn hum pickup loop, particularly if the environment is electrically noisy
or there are any power earth integrity issues.I would still feel inclined to
try another better quality cable, or take the whole shebang across town to
your sister's house, or wherever, and try it there.

One slight possibility comes to mind. Does the amp seem very very sensitive
? That is, does it sound like you've got sort of full chat, with the gain
control up at only say number 2 ? The reason I ask this, is that I did once
have a ProSound combo that suffered intermittently from hum, and it
eventually turned out to be due to a feedback resistor in the first opamp
stage, that ws going intermittently open circuit, increasing the gain of the
stage so much when it did, that it picked up huge amounts of hum.

Arfa