string dents

[Lance Lafargue]

Decay is still more rapid on that note.  But, I only did that one note and 
it could have preexisted, I suppose.
Lance Lafargue, RPT
LAFARGUE PIANOS, LTD
LPIANOS.com
lafargue at bellsouth.net
4244 Hwy 22 Mandeville, LA 70471
985.72P.IANO
----- Original Message ----- 
From: "Andrew and Rebeca Anderson" <anrebe at sbcglobal.net>
To: "Pianotech List" <pianotech at ptg.org>
Sent: Tuesday, December 19, 2006 10:22 PM
Subject: Re: string dents


> Mr. Lafargue,
> Come back to that piano 24-48 hours later and tell us how the CA treated 
> note's sustain is after the glue has fully set.  (I did this to a D 
> pre-concert out of desperation trying to patch up a predecessor's 
> savagery.  Two days later I couldn't find it without my notes.)
>
> Andrew
>
> At 09:30 AM 12/19/2006, you wrote:
>>This is to report my experiences with the Estonia with the string 
>>dents/false beats.  Thanks to everyone for your ideas.
>>
>>The bridge is dented on the speaking side of the cap.  I pulled one note's 
>>unisons off, and filled the dents with CA and dripped some at the base of 
>>the bridge pins in case they were loose.  I regraphited, pulled the 
>>strings with a string hook to take the "dent" out of it and pulled back to 
>>pitch.  I seated the strings gently and tuned.  I found the false beats 
>>reduced into the background, but sustain was GONE.  I suspect this is from 
>>a soft termination now with the CA.
>>Then, I picked a similar note and just lossened and took the string dents 
>>out.  This note was much improved with the false beats way in the 
>>background, but still there (these are rapid beats).  I then loosened the 
>>whole section, used a Hart string voicing hook (very small radius) and 
>>smoothed all dents out as I could and retuned.  I generally found it much 
>>improved, but again, many of the beats are still there, but soft and in 
>>the background on most.
>>
>>I also noticed a muting of the false beats with a screwdriver pressed on 
>>the offending string at the bridge cap AND I noted a similar reduction 
>>with a pair of visegrips put on the back bridge pin.  Thanks again.
>>
>>Lance Lafargue, RPT
>>LAFARGUE PIANOS, LTD
>>LPIANOS.com
>>lafargue at bellsouth.net
>>4244 Hwy 22 Mandeville, LA 70471
>>985.72P.IANO
>>----- Original Message ----- From: "RicB" <ricb at pianostemmer.no>
>>To: <pianotech at ptg.org>
>>Sent: Saturday, December 16, 2006 12:50 PM
>>Subject: [SPAM] [CAUT] string dents
>>
>>
>>>Hi Lance.
>>>
>>>I suspect the kinks themselves do little to contribute to the false
>>>beats, and I doubt seriously un-kinking them will help. Rather... the
>>>force required to create such a kink directed in against the
>>>bridge/bridgepin is bound to cause some degree of springyness to the
>>>termination as a whole. Not much you can do except to relieve that
>>>condition as best as possible.  CA may help, repinning may help... you
>>>might consider repinning with epoxy.  Check a few unisons to see how
>>>deep/steep an indentation in the bridge wood has been made and look for
>>>an elongation of the surface area around the bridge pin hole.
>>>
>>>Cheers
>>>RicB
>>>
>>>
>>>
>>>    A "new" RPT tech working for me got a little excited about string
>>>    voicing and in the process of "tapping" down strings on a new piano,
>>>    went too far.  The strings were hit in the speaking length segment,
>>>    in the direction of termination with the bridge pin V.  In other
>>>    words, straightening the speaking length segment before it
>>>    terminates at the bridge pin. Consequently, there is a visible
>>>    "dent/kink" in the wire in the speaking length just before the
>>>    bridge termination, creating more false beats than the ones that
>>>    were to be eliminated.  Is there a cure short of restringing that
>>>    section?  i.e., loosening string and straightening wire with hook as
>>>    good as possible and retightening?  Thanks.
>>>
>>>    Lance Lafargue, RPT
>>>    LAFARGUE PIANOS, LTD
>>>    LPIANOS.com
>>>    lafargue at bellsouth.net
>>>    4244 Hwy 22 Mandeville, LA 70471
>>>    985.72P.IANO
>>>    -------------- next part --------------
>>>    An HTML attachment was scrubbed...
>>>    URL:
>>>
>>>https://www.moypiano.com/ptg/caut.php/attachments/20061215/26b5a245/attachment.html
>>>
>
>