Jurgen and Jack, I have always found that thinning the shank raised the pitch. I tried yesterday to lower the pitch by thinning the shank and couldn't do it. The pitch went up every time I thinned a shank. Perhaps Bluthner has a method that is different? Tim Coates On Feb 21, 2008, at 8:06 PM, Jack Houweling wrote: > Jurgen, > Could you tell us what tool they used and also did they support > the shank while scraping in any way? Or was it done outside > of the action? > Jack Houweling > > Thinner shanks will be more flexible and less stiff, hence they will > have a resonating frequency. I saw techs "smoothing out" the shank > frequencies in the Blüthner factory, They would sort shanks so that > similar sounding ones were together. If one shank stood out, they > could lower its pitch by thinning the shank through judicious > scraping. > The pitch could only be adjusted downward. > > Jurgen Goering > > -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/20080221/f8f65073/attachment.html
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