Back to coil tapping, momentarily

[Jon Page]

Once the coil is set tightly around the pin, wouldn't further tapping also
have
an affect on pin torque or front string segment tension or allow pin to 'slip'
due to the tension ?  

I usually set/tap the coils many times during the chipping/ first tuning
process but after that would there be any real need to continue the process?
It's not as though there are forces on the coil as on the bridge pin and
string.

Just some thoughts,

Jon Page
Harwich Port, Cape Cod, Mass. (jpage@capecod.net)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At 08:25 PM 4/23/98 EDT, you wrote:
>et al;
> On the Kawai GE1 I am restringing, correction have restrung. I conducted
some
>measurement tests on coil tapping/evening/leveling.
> Procedure was:
>1.  After the first chipping I raised and tapped coils, no measuring but as
>usual there were very significant changes in each note.
>2. after 2nd chipping and two tuning passes (SAT) I tapped the coils again
>with the following results..all measured from 440 SAT temperament.
>F3: -58 cents
>A3: -60 cents
>F4: -63 cents
>A4: -43 cents (low because I fooled with this note most?)
>F5: -68 cents
>A5: -71 cents
>F6: -77 cents
>A6: -82 cents
>
>3. Last night I increased the page by 5  cents (A440 +5cents) and tuned the
>thing for the seventh time.  It sat all day without being touched and I just
>went over and tapped the coils again. This time there was a spread of from 10
>cents(F3) to 23 cents(A6) almost evenly divided/graduated through the same 8
>measured notes.
>
>  Based on these measurements I would say that tapping definitely changes
>tensions in string length (and should be a good adjunct to tuning stability?)
>  So there it is, use it as you will.
>Jim Bryant (FL) 
>
> 
>
>