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fishman hum?

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D

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May 31, 2004, 5:53:30 PM5/31/04
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I have a fishman matrix natural I pickup on my acoustic, that was fitted
professionally before i bought the guitar.
Occasionally I get a really bad earth hum, if I touch the jack plug it
stops. If I loosen the strings and then retune it usually fixes the problem.
It will re-occur periodically and without warning.
I have looked at the full pickup system with a magnifying glass and cant see
any faults or breaks in the screening.
The hole that the wire passes through is not too tight.
Any ideas?


D

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May 31, 2004, 5:53:49 PM5/31/04
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Stewart Ward

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Jun 1, 2004, 7:53:28 AM6/1/04
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Mostly, this common problem is due to the fact that the strings are not
generally earthed on acoustic guitars. This means that noise picked up by
your body (aerial) is not grounded like it would be with an electric guitar.

The awswer is to have an electrically conductive bridge saddle or find a way
of discreetly grounding the strings at the headstock... not easy or pretty.
I strongly suggest changing the saddle for a metal one and ensure it is
grounded. You may not like this idea, for sonic reasons... but frankly,
there is no other solution.

Good luck.

--
Stewart Ward
www.Award-Session.com

Tel. 01256 477 222 Intl. +44 1256 477 222
Guitar Amps, Guitars, Speakers, Pickups, Cables & Amp Repairs.


"D" <d.mu...@virgin.net> wrote in message
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Cliff

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Jun 1, 2004, 8:51:54 AM6/1/04
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>If I loosen the strings and then retune it usually fixes the problem.

I get that on my Dean Markeley Sweet Spot pickup, which is also a piezo pickup.
It seems to stop if I hit the bridge with my thumb.

Your retuning suggests we both have the same problem, which is the pickup is
not making good contact with the bridge.

Make sure the foot of the saddle and the bridge are totally flat and make good
contact with one another. Or give the bridge a little tap with your thub and
see if that works.

It might not answer your question, but it helps me understand my problem more.

Cliff
http://www.soundclick.com/bands/6/cliffjonesmusic.htm

D Mumford

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Jun 1, 2004, 10:07:49 AM6/1/04
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It seems be set off when the room gets warmer, so string pressure may be the
issue.


"Cliff" <cliffj...@aol.comsnowspam> wrote in message
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