thumping dampers

[Dean May]

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Yes, under the keybed. Sorry I wasn't clear. It should be directly above
the back of the pedal or pedal lift rod into the bottom side of the
keybed. The purpose of the stop is to provide an adjustable limit to the
upward travel of the lift rod.
 
Dean
Dean May             cell 812.239.3359
PianoRebuilders.com   812.235.5272
Terre Haute IN  47802
 
-----Original Message-----
From: Joe And Penny Goss [mailto:imatunr@srvinet.com] 
Sent: Tuesday, January 10, 2006 9:05 AM
To: deanmay@pianorebuilders.com; Pianotech
Subject: Re: thumping dampers
 
Hi Dean,
Do you mean from under the key bed?
Joe Goss RPT
Mother Goose Tools
imatunr@srvinet.com
www.mothergoosetools.com
----- Original Message ----- 
From: Dean <mailto:deanmay@pianorebuilders.com>  May 
To: 'Pianotech' <mailto:pianotech@ptg.org>  
Sent: Tuesday, January 10, 2006 6:37 AM
Subject: RE: thumping dampers
 
To minimize thumping dampers you should minimize their travel. There
should be a stop screwed into the keybed directly above the pedal lift
rod. Adjust the stop down until the bicord dampers are just coming off
the string. To adjust it really "hot" the bottoms of the bicords do not
have to clear the top of the string- leave some of the wedge down
between the strings. 
 
As you minimize the lift off the strings you are also minimizing the
dampers' return velocity, which will also minimize the thumping. 
 
BTW, if there is no stop screw there, just put one in. A 1/4 X 1 inch
hex bolt works great. Drill a hole in the keybed and thread the bolt
into it. Glue a piece of felt on top of the trapwork lever and, viola,
you have a stop adjustment. 
 
Dean
Dean May             cell 812.239.3359
PianoRebuilders.com   812.235.5272
Terre Haute IN  47802
 
-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf Of James Grebe
Sent: Tuesday, January 10, 2006 8:25 AM
To: Pianotech
Subject: Re: thumping dampers
 
Move the mic further away from the dampers.  Most place it too close.
James
James Grebe   Piano Tuning & Repair   Member of M.P.T.  
R.P.T. of the P.T.G. for over 30 years.   "Member of the Year" in 1989
   Creator of Handsome Hardwood Caster Cups, Piano Benches, Writing
Instruments
(314) 845-8282   1526 Raspberry Lane   Arnold, MO 63010
BECOME WHAT YOU BELIEVE!
pianoman@accessus.net
----- Original Message ----- 
From: richard.ucci@att.net 
To: pianotech@ptg.org 
Sent: Monday, January 09, 2006 7:59 PM
Subject: thumping dampers
 
Hi Listers,
 
Client with a new Yamaha ga-1 is complaining that the dampers make a
thumping noise when his foot is taken off the sustain pedal. He is doing
some recording and it is very noticable to him. Other than changing the
spring to one with less tension , what would be a solution to his
problem?
 
Thanks,
Rick Ucci/Ucci Piano 

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