post pitch-raise creep?

[Avery]

In all my years of doing this, I've never run into a piano where the 
monochords needed that much of an overpull! I, too, would be afraid 
to do that! IMO, it isn't necessary.

I don't even use the PR function on the SAT for the bass strings. I 
start with #1 and just pull them a little sharp and go! They usually 
come out pretty close.

Avery Todd
University of Houston

At 09:46 AM 7/8/2006, you wrote:
>I've been chicken to try that big an overpull percent on the 
>monochords, for fear of breaking them.
>
>In the TuneLab Pro documentation, Robert Scott recommends 12% for 
>the bass bridge and 30% elsewhere, for small to moderate pitch 
>raises.  For better results (tuning unisons as you go, bass to treble):
>
>        bass bridge            12%
>        tenor bridge to G5   29%
>        G5 to G6                29% increasing to 37%
>        G6 to C8                37% decreasing to 14%  (tension gets 
> high up there)
>
>TuneLab's ability to measure each string and calculate a precise, 
>individual overpull percentage in realtime is one of its best 
>features, I think.
>
>--Cy--
>shusterpiano.com
>
>----- Original Message ----- From: "Farrell" <mfarrel2 at tampabay.rr.com>
>To: "Pianotech List" <pianotech at ptg.org>
>Sent: Saturday, July 08, 2006 3:38 AM
>Subject: Re: post pitch-raise creep?
>
>
>>I use a VT also Andrew, and I find that the upper end of your 
>>percent ranges work for me in the tenor and treble. However, I find 
>>that the bicord bass needs closer to 25% and for whatever reason - 
>>I certainly don't understand it - the monocord bass needs about 
>>40%. I know, I've never heard of anyone using that much overpull in 
>>the low bass, but for whatever reason, if I don't, it'll come out 
>>flat. Strange.
>>
>>Terry Farrell
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