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 Post subject: Piezo problem...
PostPosted: Thu Apr 19, 2012 3:30 pm 
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Walnut
Walnut

Joined: Thu Apr 19, 2012 3:19 pm
Posts: 4
Focus: Repair
Status: Semi-pro
Hello everybody :-) ... My first time on forum...

I have question for everyone:

Could it be that some acoustic guitar under saddle piezo's sensor pad's dont have the same output level ?

I tried everything, and i always get one string sounding more louder than all else together... PS: this piezo is cheap Chinese product...

I did next: first i got 1st string a lot louder....then i drilled hole on the other side of bridge and installed piezo otherwise...now i have 6. string much louder then else....

Logicaly: one sensor has much louder output then others...

Thanks everyone :-)


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 Post subject: Re: Piezo problem...
PostPosted: Thu Apr 19, 2012 3:46 pm 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Mon Dec 27, 2010 9:06 pm
Posts: 2739
Location: Magnolia DE
First name: Brian
Last Name: Howard
City: Magnolia
State: Delaware
Zip/Postal Code: 19962
Country: United States
Focus: Repair
Status: Professional
Yeah, that is sometimes the case. And not just with the cheap ones either.

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Brian

You never know what you are capable of until you actually try.

https://www.howardguitarsdelaware.com/


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 Post subject: Re: Piezo problem...
PostPosted: Thu Apr 19, 2012 5:02 pm 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Fri Apr 02, 2010 10:35 pm
Posts: 2561
Country: USA
Focus: Repair
Status: Professional
File the wire hole a little bigger, it's not seated all the way down so the rest of the pickup has less pressure than the end, where it's sitting on the wire.

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Old growth, shmold growth!


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 Post subject: Re: Piezo problem...
PostPosted: Thu Apr 19, 2012 9:11 pm 
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Cocobolo
Cocobolo

Joined: Thu May 12, 2011 3:27 pm
Posts: 213
First name: Alex
Last Name: Takacs
State: Illinois
Country: United States
Focus: Build
Status: Amateur
you may need a pre-amp


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 Post subject: Re: Piezo problem...
PostPosted: Thu Apr 19, 2012 11:32 pm 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Sat May 22, 2010 10:32 am
Posts: 2616
First name: alan
Last Name: stassforth
City: Santa Rosa
State: ca
Zip/Postal Code: 95404
Country: usa
Focus: Build
Status: Amateur
You need a preamp,
if you don't already have one.
Do you have one?
You need to boost the signal,
and e.q. the tone.
I like my Baggs D.I.
It works with mag pickups too!
Built like a tiny tank.


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 Post subject: Re: Piezo problem...
PostPosted: Fri Apr 20, 2012 1:57 pm 
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Walnut
Walnut

Joined: Thu Apr 19, 2012 3:19 pm
Posts: 4
Focus: Repair
Status: Semi-pro
This is acoustic guitar with undersaddle piezo and active electronic (level pot) with 4 band EQ...Whatever i do, some string are sounding a lot louder than others...I suspect that piezo sensors simply don't have same output power...


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 Post subject: Re: Piezo problem...
PostPosted: Fri Apr 20, 2012 6:35 pm 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Mon Dec 27, 2010 9:06 pm
Posts: 2739
Location: Magnolia DE
First name: Brian
Last Name: Howard
City: Magnolia
State: Delaware
Zip/Postal Code: 19962
Country: United States
Focus: Repair
Status: Professional
What is the saddle material? That can make a difference. Sometimes by "notching" the saddle where it sits in the slot to create a foot for each string can help balance them out.

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Brian

You never know what you are capable of until you actually try.

https://www.howardguitarsdelaware.com/


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 Post subject: Re: Piezo problem...
PostPosted: Fri Apr 20, 2012 7:56 pm 
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Walnut
Walnut

Joined: Thu Apr 19, 2012 3:19 pm
Posts: 4
Focus: Repair
Status: Semi-pro
the saddle is some white plastic ("artificial bone" or something)... I am almost sure that there is some diference in output signal between sensors...in last case 2. string is ringing louder that 6. ...


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 Post subject: Re: Piezo problem...
PostPosted: Sat Apr 21, 2012 6:53 am 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Mon Dec 27, 2010 9:06 pm
Posts: 2739
Location: Magnolia DE
First name: Brian
Last Name: Howard
City: Magnolia
State: Delaware
Zip/Postal Code: 19962
Country: United States
Focus: Repair
Status: Professional
Swap out the transducer and see if the problem goes away. Also check that the bottom of the saddle slot is flat and smooth.

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Brian

You never know what you are capable of until you actually try.

https://www.howardguitarsdelaware.com/


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 Post subject: Re: Piezo problem...
PostPosted: Sat Apr 21, 2012 8:54 am 
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Contributing Member
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Joined: Sat Jan 03, 2009 6:24 pm
Posts: 314
First name: EddieLee
Last Name: Brown
In my experience this issue has not been a pickup problem. The channel and the bottom of the saddle needs to be very flat. Make sure the wire hole is big enough for the pickup to set flat. Clear the slot of any thing that may in there and verify it is flat. Flatten the bottom of the saddle. If all else fail slightly notch under the loud string.

I had a Martin in yesterday with the same issue. I cleaned the slot and flattened the bottom of the saddle. Sounded good after that.

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EddieLee


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 Post subject: Re: Piezo problem...
PostPosted: Tue Apr 24, 2012 8:12 pm 
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Walnut
Walnut

Joined: Thu Apr 19, 2012 3:19 pm
Posts: 4
Focus: Repair
Status: Semi-pro
I got it :-) ... I flattened saddle slot and sanded saddle bottom straight and now all strings sound equal... Bingo :-)

I have another question for everyone:

When this acoustic guitar was without strings, looking from the bottom of the guitar, space between bridge and guitar top was 0mm... now I installed 0.012-0.054 bronze strings and, after 2-3 days, i notice split about 1mm wide between guitar top and bridge... the split is only in center part of bridge , ends didn't split from body top...

Questions are:

1. Is this serious problem ?
2. Should I apart this bridge and reglue it again ?
3. Do I have to worry about this, if I put 0.009 strings ?

Thanks everyone


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 Post subject: Re: Piezo problem...
PostPosted: Wed Apr 25, 2012 7:42 pm 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Mon Dec 27, 2010 9:06 pm
Posts: 2739
Location: Magnolia DE
First name: Brian
Last Name: Howard
City: Magnolia
State: Delaware
Zip/Postal Code: 19962
Country: United States
Focus: Repair
Status: Professional
Sounds like the bridge is pulling off. I would remove and re-glue it.

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Brian

You never know what you are capable of until you actually try.

https://www.howardguitarsdelaware.com/


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