False Beats in high treble after stringing

[Farrell]

Dave Smith wrote:

>>About 1/3 of the bridge pins were loose and I had 
>>removed and replaced after putting epoxy on the ends of the pins.  Also a 
>>little epoxy whereever there appeared to be any hints of small cracks 
>>near the pins.

>From your description here, as I understand it, it might be possible that not enough epoxy was applied. My procedure (when using original size pins is to use a wire or some similar tool to dip into thin epoxy and swab the hole real good - getting at least several drops of epoxy in there. Then I dip the pin end into epoxy and push the pin into place. Enough epoxy should have been placed into hole so that the bridge pin displaces the excess epoxy which overflows the pin hole.

Terry Farrell
  
----- Original Message ----- 
From: "Greg Newell" <gnewell@ameritech.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Tuesday, June 10, 2003 1:42 PM
Subject: Re: False Beats in high treble after stringing


Dave,
         Re-reading your original post, which you were kind enough to copy 
in this reply to mine, I see that this piano is a grand. Before stringing 
did you polish the capo d' astro bar? I certainly hope so. If not you could 
try letting down the tension a wee bit and sliding the new strings from 
side to side in an effort to lessen the effect of the grooves that were 
worn into the underside of the bar from the old strings. If the problem is 
in the agraffe section then you could try similar action or even replace a 
few agraffes and re-string that part to see if the problem goes away. If 
you sure that the problem is not at the bridge end this is the only contact 
area left to look at. You could also try muting off the waste end of the 
strings on both sides before attempting a new agraffe or two. Hope this helps.

Greg Newell



At 12:03 AM 6/10/2003, you wrote:

>Greg, I am not sure of very much.  What do you suggest?
>
>Dave Smith SW FL
>----- Original Message -----
>From: <mailto:gnewell@ameritech.net>Greg Newell
>To: <mailto:pianotech@ptg.org>Pianotech
>Sent: Monday, June 09, 2003 11:52 PM
>Subject: Re: False Beats in high treble after stringing
>
>Dave,
>         Are you sure that the false beats are coming from the bridge end 
> o the string?
>
>Greg Newell
>
>
>
>At 09:09 PM 6/9/2003, you wrote:
>
>>Just finished stringing my Wing and Sons upright piano project and have 
>>quite a few false beats in the last two octaves of treble in single 
>>strings.  My first restringing project.  Phil Bondi suggested that I ask 
>>on-list for advice.  The treble bridge seemed (to me anyway) to be in 
>>pretty good shape.  About 1/3 of the bridge pins were loose and I had 
>>removed and replaced after putting epoxy on the ends of the pins.  Also a 
>>little epoxy whereever there appeared to be any hints of small cracks 
>>near the pins.    Great results, except in certain strings of the high 
>>treble. Other than there, the piano sounds great.   I don't see anything 
>>different about these strings or the bridge from other strings, but I 
>>think I need to fix if possible.  For example, B6 center string has a 
>>beat of about 2 bps.  Not as loud as a real beat between two strings, but 
>>still THERE.   Some higher strings beat faster.
>>
>>I have experimented with seating the strings with my copper rod, at each 
>>bridge pin.  Also tried tapping each bridge pin in a small bit.  Doesnt 
>>seem to help, except in certain strings.  I did lightly sand and buff the 
>>v-bar before restringing, and think I have the right adjustment on the 
>>pressure bar.  I've been reading the archives and the PTG CD articles re 
>>false beats, but the number of "hits" for this search term is overwhelming.
>>
>>Can anyone offer me advice on what to do next to reduce the false beats, 
>>short of unstringing and recapping bridge, etc?  I would appreciate your help!
>>
>>Frustrated in Florida,
>>
>>Dave Smith
>>SW FL
>>
>>---
>>
>>Checked by AVG anti-virus system (http://www.grisoft.com).
>>Version: 6.0.486 / Virus Database: 284 - Release Date: 5/29/2003
>
>Greg Newell
>Greg's piano Forté
>mailto:gnewell@ameritech.net
>
>
>----------
>
>---
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>Checked by AVG anti-virus system (http://www.grisoft.com).
>Version: 6.0.486 / Virus Database: 284 - Release Date: 5/29/2003
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>----------
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives
>
>
>---
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>Checked by AVG anti-virus system (http://www.grisoft.com).
>Version: 6.0.486 / Virus Database: 284 - Release Date: 5/29/2003

Greg Newell
Greg's piano Forté
mailto:gnewell@ameritech.net 



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> 
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> 
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.486 / Virus Database: 284 - Release Date: 5/29/2003
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