1StringPitch Raise

[Newton Hunt]

Over pulling by 30% will effectively bring the piano to pitch when done
and unison tuned when the piano is fully stripped.  25% when tuning
unisons as you go.

You are not "stressing" the soundboard but the plate when changing the
pitch either up or down.

Pitch lowering requires the same over push.

		Newton

> John Tonyan wrote:
> 
> (Dear list, I'm posting this again, hoping for a response.)
>     I've been experimenting with an old pitch raising technique for
> instruments which are more than 30¢ flat that works for me, but want
> to improve it and would like some feedback.
>     I strip-mute the whole piano, over-pull the wound strings (3.5¢
> max.), then taper the over-pull from +5.5¢ in the tenor to as much as
> +10¢ at C6and up. When I encounter an area of the piano that is more
> than 30 cents flat (that is, where I would be over-pulling by 10
> cents), I change over from tuning unisons to quickly and quietly
> tuning only the center string (+10¢ max) without pulling the mute.
> Then go back to the unisons and continue with the pitch raise and the
> tapered over-pull.
>     This quick pre-loading of the board before the actual "pitch
> raise" seems to get me to pitch faster (2 pitch raises max), and being
> one who has broken a plate in a client's piano by overstressing one
> area of the plate, it gives me a little more comfort when I'm doing a
> 100¢ p.r. to have 1/3rd of the scale at pitch before pulling up the
> rest.
>     I have also (unsuccessfully) experimented with this technique
> where the piano needed only a small p.r. (say, under 10¢) and time was
> short. I don't know if this is just a bad idea, or if I'm not
> calculating the over-pull properly, but I'm far from the mark.
>     How do I calculate the amount to over-pull that center string in
> the above scenarios, and what are the opinions of the second scenario?
> 
> Thanks for the help.
> John Tonyan