[pianotech] Tuning instability

[Susan Kline]

What a brilliant idea, from the guy who invented the taut line 
regulation gauge, which I always
have with me. (Don't leave home without it.)

Susan

Jon Page wrote:
> I suspect loose coils. Not so much on the vertical but the wrap around 
> the pin. Separated coils do not inand of themselves contribute to 
> instability but slackness in the wrap does. recently, I had a Samick 
> which was 'squirrelly' tuning wise. I gripped the coils with parallel 
> pliers and rotated counter-clockwise and the pitch dropped on each 
> string betwqeen 60c and a minor 3rd.  It is very stable now. This is 
> my new normal procedure for many ~20 y/o piano which come thru the 
> shop. To relieve the strain on my grip, I fashioned a pair of wire 
> bending pliers to do this, photo att.
>
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