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Permalink Reply by Paul Craig on October 17, 2015 at 11:43am

One in the bridge is fine. Some like to wire a second piezo under the top/sound board for n alternative sound and wire them to a 3-way switch or wire them together in parallel.

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Permalink Reply by Alcides Cursino de Siqueira Neto on October 19, 2015 at 12:01am

Thank you for the information!

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Permalink Reply by Alcides Cursino de Siqueira Neto on October 26, 2015 at 6:49am

 have a problem:  Embed a piezo a wooden base and put a screw top to make a bridge .  When I called the amplifier , he began to make a noise ; As a noise or something.  When I took the wooden base of the screw the noise stopped .  Does probema is in the bolt material ?

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Permalink Reply by Paul Craig on October 26, 2015 at 8:34am

For some reason your post isn't coming through.

So I guess you now have 2 problems. Hahaha

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Permalink Reply by Paul Craig on October 26, 2015 at 8:36am

Repost and see if it goes through.

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Permalink Reply by Alcides Cursino de Siqueira Neto on October 27, 2015 at 5:39am

have a problem:  Embed a piezo a wooden base and put a screw top to make a bridge .  When I called the amplifier , he began to make a noise ; As a noise or something.  When I took the wooden base of the screw the noise stopped .  Does probema is in the bolt material ?

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Permalink Reply by darryl kernaghan on October 27, 2015 at 6:00am

not 100% sure what you are asking,but firstly,is the screw making contact with metal rim AND ceramic of piezo,making a short circuit? sounds like you may have an extreme feedback problem,try encasing the piezo element in some type of isolating/deadening material,hot glue/leather/liquid rubber etc and see if that helps

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Permalink Reply by Alcides Cursino de Siqueira Neto on October 27, 2015 at 6:13am

The piezo was stuck beneath the wooden base with hot glue and isolated with the same glue. The screw was placed at the opposite end of the wooden base and introduced noise . When I removed the screw the noise stopped.

I assuming that the noise associated with the bolt material which must be of a ferrous metal .I realized, in research, who all bridges piezos have seen, are made from bone or brass.

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Permalink Reply by Paul Craig on October 27, 2015 at 6:32am

Try a piece of aluminum, brass bolt/screw or bone. Are your strings grounded?

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Permalink Reply by Alcides Cursino de Siqueira Neto on October 27, 2015 at 6:40am

how can I do this with piezo ?

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Permalink Reply by Clark Rowden on October 27, 2015 at 9:09am

From my (limited) experience, 2 disk piezos wired together in parallel produce less hum than just one. But they all hum just a little.

As for the problem, try running a wire wrapped around the screw to the ground lug on the output jack.

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Permalink Reply by Paul Craig on November 5, 2015 at 11:11am

Did you get this sorted out?

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