scratchy piezo ..

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hapsong
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scratchy piezo ..

Post by hapsong » Sun Feb 16, 2020 3:48 pm

Greetings - I just made this post on one of the Facebook groups but thought someone might have some insights here as well .. attached is a photo of the bridge to my 2004 Mojo- when I'm using the piezo and bending on either the E(1) or B(2) strings, I get a scratchy sound almost like it's cutting in and out.. It happens much more on the E(1) string even when I'm just using vibrato and not bending the note that much .. If I lift the string out of the saddle and reset it, it plays nice for a short while (~1/2 hour) but then acts up again. Any thoughts on how to fix this?
Thanks - Greg Matses
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jb63
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Re: scratchy piezo ..

Post by jb63 » Sun Feb 16, 2020 4:25 pm

The piezo saddles are all connected to the bridge with a band of solder and its possible that those 2 strings need resoldering. That would be my guess. Its a pain because you have to take the bridge off, so I'd try a few more things first. Swap the battery for new, look under the hood to see that all the connections to the preamp are tight...
just plain lost

hapsong
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Re: scratchy piezo ..

Post by hapsong » Sun Feb 16, 2020 5:15 pm

jb63 wrote:
Sun Feb 16, 2020 4:25 pm
The piezo saddles are all connected to the bridge with a band of solder and its possible that those 2 strings need resoldering. That would be my guess. Its a pain because you have to take the bridge off, so I'd try a few more things first. Swap the battery for new, look under the hood to see that all the connections to the preamp are tight...
thanks jb63 - I'll give your suggestions a shot ..

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vjmanzo
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Re: scratchy piezo ..

Post by vjmanzo » Sun Feb 16, 2020 10:41 pm

JB63’s suggestions are where I’d start.

I’ve also heard recently (but have never really experienced personally) that certain strings other than D’Addario (recommended in the manual) have ends that can cause grounding issues. I have no idea what to make of that, but if your piezo seems to work sometimes, then that’s a good sign.

Once, while setting up a friend’s Fly Concert, we had a weird grounding issue with a piezo on only one string; I changed the set of strings to a set of D’Addario strings, and the issue disappeared and never returned. Again: that’s not enough evidence to suggest that the strings were the culprit, but, as you continue to explore, maybe consider the strings as well. Piezo elements are tricky little buggers sometimes!

Keep us posted!
Fly Mojo '05, Fly Deluxe '07 w/Sustainiac, Fly Mojo '08 w/Sustainiac, Fly Concert '97, Fly Classic '03, Fly Deluxe '97, Fly Artist '10, Fly Deluxe Redwood '93, Fly Bass FB-4 '03, NiteFly NFV3 '97, Fly Mojo 12-string ‘11, Fly Concert ' 98, Fly Maple Custom '01, Fly Nylon '99, Fly Stealth '00 info

hapsong
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Re: scratchy piezo ..

Post by hapsong » Mon Feb 17, 2020 5:08 pm

vjmanzo wrote:
Sun Feb 16, 2020 10:41 pm
JB63’s suggestions are where I’d start.

I’ve also heard recently (but have never really experienced personally) that certain strings other than D’Addario (recommended in the manual) have ends that can cause grounding issues. I have no idea what to make of that, but if your piezo seems to work sometimes, then that’s a good sign.

Once, while setting up a friend’s Fly Concert, we had a weird grounding issue with a piezo on only one string; I changed the set of strings to a set of D’Addario strings, and the issue disappeared and never returned. Again: that’s not enough evidence to suggest that the strings were the culprit, but, as you continue to explore, maybe consider the strings as well. Piezo elements are tricky little buggers sometimes!

Keep us posted!
thanks VJ ..

Mr303
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Re: scratchy piezo ..

Post by Mr303 » Tue Feb 18, 2020 11:21 pm

I wonder if painted string ends would cause an insufficient electrical path?
Are D’Addario’s painted or brass? Inquiring minds might have a set on hand... :)
Could dirt or dust under the piezo saddles cause scratchiness?

hapsong
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Re: scratchy piezo ..

Post by hapsong » Wed Feb 19, 2020 2:37 pm

Mr303 wrote:
Tue Feb 18, 2020 11:21 pm
I wonder if painted string ends would cause an insufficient electrical path?
Are D’Addario’s painted or brass? Inquiring minds might have a set on hand... :)
Could dirt or dust under the piezo saddles cause scratchiness?
good questions - I haven't tried changing the string out yet but I will this week .. I am using D'addario's and they do have colored ends, the high E is silver - some interesting info on that here http://www.jmstaehli.com/guitar_css.html ..

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vjmanzo
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Re: scratchy piezo ..

Post by vjmanzo » Wed Feb 19, 2020 3:23 pm

For what it’s worth: I’ve been using the D’Addario XL110 strings on all of my Flys for many years and I’ve never encountered an issue; those strings do have the colored ball ends.
Fly Mojo '05, Fly Deluxe '07 w/Sustainiac, Fly Mojo '08 w/Sustainiac, Fly Concert '97, Fly Classic '03, Fly Deluxe '97, Fly Artist '10, Fly Deluxe Redwood '93, Fly Bass FB-4 '03, NiteFly NFV3 '97, Fly Mojo 12-string ‘11, Fly Concert ' 98, Fly Maple Custom '01, Fly Nylon '99, Fly Stealth '00 info

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vjmanzo
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Re: scratchy piezo ..

Post by vjmanzo » Wed Feb 19, 2020 3:28 pm

For reference, the relevant information on the link @hapsong provided is in the screenshot below:
9B221A30-FEED-455A-8978-414FF18803E1.jpeg
Fly Mojo '05, Fly Deluxe '07 w/Sustainiac, Fly Mojo '08 w/Sustainiac, Fly Concert '97, Fly Classic '03, Fly Deluxe '97, Fly Artist '10, Fly Deluxe Redwood '93, Fly Bass FB-4 '03, NiteFly NFV3 '97, Fly Mojo 12-string ‘11, Fly Concert ' 98, Fly Maple Custom '01, Fly Nylon '99, Fly Stealth '00 info

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Barry
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Re: scratchy piezo ..

Post by Barry » Wed Feb 19, 2020 9:39 pm

Geez, that's bizarre!
Interesting, but bizarre! :(

Parkers often strike me as being a tad precious in the engineering department. :ugeek:
Too clever for their own good sometimes.
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Mr303
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Re: scratchy piezo ..

Post by Mr303 » Thu Feb 20, 2020 8:11 am

vjmanzo wrote:
Wed Feb 19, 2020 3:23 pm
For what it’s worth: I’ve been using the D’Addario XL110 strings on all of my Flys for many years and I’ve never encountered an issue; those strings do have the colored ball ends.
I like NYXl 9 gauge and don’t seem to have this problem.
It seems odd the tailpieces won’t or somehow fail to make contact between different guitars.
Do the piezo’s act up on other models?

hapsong
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Re: scratchy piezo ..

Post by hapsong » Sun Mar 01, 2020 11:43 am

so I changed strings and replaced the battery with a fresh one - I even blew compressed air in and around the saddle .. but the scratchiness still remains - going to open it up this week and check connections..

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