"Ron(UK)" wrote in message
...
Ron(UK) wrote:
Pooh Bear wrote:

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


Or the screen is open on the cable.

Ron(UK)


Or the ground side of the input socket is open circuit, probably fractured
solder joint. It will ground when no plug is inserted if it has a shorting
contact on both sides.

Ron(UK)

--
Lune Valley Audio
Public Address Systems
Hire Sales Maintenance
www.lunevalleyaudio.com

But he has said that it all works ok with the lead and guitar plugged in -
guitar sound is normal, amplification level is normal, just rather too much
hum. Thus, there cannot be an open circuit either on the cable shield, or on
the ground PCB terminal of the input jack ...

Arfa