no rep on upright

[wimblees at aol.com]

Tom

Thanks for this answer. I will weaken all the springs. 
 


Willem (Wim) Blees, RPT
Piano Tuner/Technician
Mililani, Oahu, HI
808-349-2943
Author of: 
The Business of Piano Tuning
available from Potter Press
www.pianotuning.com


-----Original Message-----
From: tom <tomtuner at verizon.net>
To: 'Pianotech List' <pianotech at ptg.org>
Sent: Tue, 14 Oct 2008 1:29 am
Subject: RE: no rep on upright




 

 


Subject: no rep on upright


 

I installed a set of new hammer return springs on a Steinway console several weeks ago. The touch is on the heavy side, but not unplayable. Even though everything works "right", on soft blows, the jack isn't going back under. The keys are eased, the wippens and not sluggish, the hammer flanges are not tight, and the jacks return when the keys comes up all the way, and  But on a medium fast repetition, the jack doesn't come back under, and the hammer butt gets caught on the back check.  Would weakening the return springs help this? Or is there something else I should be looking for. 


Willem (Wim) Blees, RPT

            

Wim,

 The late great Steve Jellen addressed this in class. A too strong hammer return spring can overpower the returning jack. I would first check the jack pining, jack springs and condition of the butt leather and smoothness of jack tops. Also having the hammers check closer to the strings can give the jack more room to return. Capstan-whippen20cushion friction and maybe even spoons digging into the damper levers could be worth a look. 

A thousand years ago I was stocking up on all sorts of supplies and theorized that “heavy duty” and “heaviest -strongest “   had to be the best choice for everything.

I think some of those springs are still kicking around the shop.

Best,

Tom D.








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