High overtone

[Joe And Penny Goss]

Hi all,
As I understand it, if you change the pitch ie one half step lower and the
problem diminishes. It can be long mode vibration.
Secondly, the longitudinal mode overtone is a pitch that comes at the 16,
17, 18 or19 partial.
If this is what you have call James A for a new string based on the info
from its neighboring strings.
He's way into solving this type of problem.
My guess: if the partial ringing is lower than the 6 partial it is a
misplaced or damaged damper or core wire.
Or like others have mentioned waste end ringing through.
Joe Goss RPT
Mother Goose Tools
imatunr at srvinet.com
www.mothergoosetools.com
----- Original Message ----- 
From: "Porritt, David" <dporritt at mail.smu.edu>
To: "Pianotech List" <pianotech at ptg.org>
Sent: Wednesday, June 13, 2007 7:33 AM
Subject: RE: High overtone


> Paul:
>
> This is out of (or at least on the very edge) of my realm of
> understanding but I think you might have to get a different string if it
> is a longitudinal mode vibration.  I have Jim Ellis' book about this but
> it's at home.  If you haven't found the information by the time I get
> home I'll check it.
>
> dp
>
> David M. Porritt
> dporritt at smu.edu
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On
> Behalf Of Paul Chick (Earthlink)
> Sent: Wednesday, June 13, 2007 7:46 AM
> To: 'Pianotech List'
> Subject: RE: High overtone
>
> David and others: if the pitch change technique works or diminishes the
> problem, what would be the next step to keep the overtone diminished or
> better nearly inaudible?
> Paul C
>
> Subject: RE: High overtone
>
> As someone else mentioned this sounds to me like a longitudinal mode
> frequency.  Change the pitch of the note and see if the pitch of the
> whine changes or if it goes away.
>
> dp
>
> David M. Porritt
> dporritt at smu.edu
>
>