[CAUT] Bechstein model B tuning stability

Fred Sturm fssturm at unm.edu
Sat Oct 17 12:19:38 MDT 2009


On Oct 17, 2009, at 10:27 AM, David Love wrote:

> A very conscious rotary motion with even a slight forward press  
> (sounds like a golf swing) and a closer to 12:00 hammer position.


	I'll second this notion, very much including the "forward press." If  
the twist of the pin is enough to pull the string through and past  
friction before the pin turns in the block, a downward pressure on the  
hammer is an excellent technique. The idea is to balance things so  
that the turn of the pin in the block, and the movement of the string  
past friction points, are coordinated, they happen perfectly in sync.  
So use a 12 o'clock position of hammer, and apply pressure downward or  
upward on the end of the hammer lever (essentially "flagpoling" the  
pin forward or backward), so that when you feel the pin begin to move  
in the block, the pitch just begins to move. This will vary depending  
on tightness of the pin and amount of friction on the bearing points,  
so you have to calibrate what you do to the piano, and to the  
individual pin.
	It's not always possible to do this perfectly, but you can usually  
get quite close, and this technique makes things far  less confusing -  
you know where you are at all times. Another factor is a good stiff  
hammer. I got a Fujan recently, and it is amazingly better than  
anything else I've tried. The feel of the pin is much clearer, and  
calibration of how much to push or pull (or "impact" - nudge) is much  
more precise, since there isn't any significant "spring" stored in the  
hammer lever itself. All muscular effort is directed at the pin.
Regards,
Fred Sturm
University of New Mexico
fssturm at unm.edu





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