Pitch Raising Techniques

[David Love]

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That would be 32% of the amount flat.  So if the piano is 20 cents flat,
you are only raising it 6.6 cents above its normal place.  That
shouldn't create any problems.  If the piano is 100 cents flat, maybe a
third pass is in order so as not to overdo it.  On very old pianos with
compromised string condition you  might need to make a judgment call.
On most pianos there won't be a problem.   It may be archaic, but it
works.  
 
David Love
davidlovepianos@comcast.net 
-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf Of Joe Garrett
Sent: Wednesday, December 01, 2004 7:48 AM
To: pianotech
Subject: Re: Pitch Raising Techniques
 
David Love said: "15% overpull in the bass, 25% in the midrange, 32% in
the upper range.
On small spinets, reduce the numbers by 5% each.   Do unisons as you
go."

 
David,
I must take exception to this technique! Although, it will work most of
the time on most Olde Uprights and Grands, there is always the
exception. This technique is archaic, to say the least. There are better
ways. The 32% in the upper treble will most likely get someone in a
world of hurt! Most strings, in that area, are already at/above 50% of
their breaking strength!!! You raise it another 32% and strings will
break, IMO. I've done some studying on the subject and wrote an article
for the PTJ, in Dec. 1999.
Regards,
Joe Garrett, R.P.T.
Captain, Tool Police
Squares R I

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