Passive Piezo UST and volume pot?

[Albatross]

What i do for my piezo equipped guitars that have the strings through bridge is to solder a bit of wire to a strip of copper tape back to the jack ground and then copper tape goes under the bridge plate (all a bit tricky but this does work).

So now you can see the adhesive side of the copper tape when looking down through the bridge pin holes. Then i carefully punch through the tape of each hole and tidy up the hole from inside the guitar.

When the string goes through the hole it is pushed into the copper tape and grounded. Touching the stings silences the hums!

Got the idea from seeing this... Platemate

Not tried this on a passive mag pup but i think it would likely work.

The tape works for me but then i'm not out changing strings every day.

[Albatross]

Spent ages going through this hoop by the way. I make my own preamps now based on this design.

http://www.till.com/articles/GuitarPreamp/

His cable works really well too...

http://www.till.com/articles/PreampCable/index.html

Veroboard layout http://tagboardeffects.blogspot.com/201 ... llman.html

[Sam Spoons]

FWIW this is a piezo under saddle jobbie, not a mag. What I'm struggling with is the fact that the Aylward and mandolin are totally silent... I'm not holding out any hope that shielding the jack will help as the problem doesn't seem to be EMI, it doesn't change when I move the guitar but I'll give it a go. The copper foil trick sounds like it might help too, thanks for that suggestion.

[Albatross]

Might help someone anyway.

[Sam Spoons]