Pitch Raising Techniques

[pianolover 88]

<<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!!! >>


I do a LOT of PR work, mostly on older, neglected verts & grands. I use my 
SAT lll to calculate overpull, usually none in bass, then 25% in mid and 33% 
in treble, tuning only center strings as I go. whether the piano is 10c or 
100c+ flat, i **RARELY** break any strings whatsover. Usually always end up 
within 2-5 cents of A440, (after one pass) regardless of initial 
flatness/sharpness. I truly believe part of this is due to technique, and 
also because I ALWAYS lube the bearing points; usually with protek.  Could 
just be good luck too!
Terry Peterson



----Original Message Follows----
From: &quot;Joe Garrett&quot; &lt;joegarrett@earthlink.net&gt;
Reply-To: Pianotech &lt;pianotech@ptg.org&gt;
To: &quot;pianotech&quot; &lt;pianotech@ptg.org&gt;
Subject: Re: Pitch Raising Techniques
Date: Wed, 1 Dec 2004 07:48:11 -0800

David Love said: &quot;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.&quot;


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