[CAUT] Shank to Hammer weight spreadsheet

[Tim Coates]

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
>
>

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