[CAUT] Strange capstan reconfiguration.

[Paul T Williams]

Hi Ed,

I have the stack off already, but I measured some other stuffs;

Spread is 113mm, Knuckle to flange is 16.5mm, Jacks are waaaay to far 
under the knuckles, key dip in the piano was 10mm, and aftertouch was 
minimal. I checked the Steinway Technical manual and indeed it needs to be 
1-3/4, not 1-7/8". Some leads have been removed, some had as many as 6 in 
the bass even to mid section.  Perhaps just a real good overhaul will be 
the trick.  Also the keybushings are shot.  I'll check the geometry after 
doing the key bushings next week.

More to come...
Paul





From:
Ed Foote <a440a at aol.com>
To:
caut at ptg.org
Date:
04/24/2010 05:03 PM
Subject:
Re: [CAUT] Strange capstan reconfiguration.



 
 I found that the capstans had been moved BACK some 7mm back and then 
turbo Renner wippens installed. I'm wondering why?  Wouldn't moving 
capstans back make the action heavier?  To "fix" this, would the turbo 
wippens make up for this in a way.  Why mess with what was there?  This is 
a Steinway B from the 20's.<> All else is "normal". It plays like a truck, 
but I found the blow distance at 1 -7/8" instead of 1-3/4" and the jacks 
are waaay too far under the jacks, so that will help a bunch fixing that. 
Greetings, 
     I think the blow on a B is usually supposed to be around 1 7/8", as 
are the D's and C's. I would be interested in what the action ratio is, 
and how much the hammers weigh, and what is the knuckle distance and 
diameter.  It would also be important to check the spread.  Also, what is 
the dip, and how much aftertouch there is. 
  "Playing like a truck" doesn't always mean "heavy" to pianists. Sometime 
excess lead in the keys will give rise to this description,ie, easy to 
play slowly, but faster or heavier play runs into the inertia problem. 
More info?
Ed Foote RPT
http://www.uk-piano.org/edfoote/index.html

 

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