plate reaction was Re: Pitch Raising to A440.......Or Not?

Ron Nossaman RNossaman@KSCABLE.com
Tue, 21 Aug 2001 06:30:11 -0500


>Ron, do you think the string would remain part way up the bridge pin when
>there is an increase in humidity causing a rise in bridge height? In other
>words, what keeps the string up the bridge-pin when there are forces
>attempting to bring it down?

No. I don't believe strings climb and remain up bridge pins at all. I
believe the edge of the bridge cap is crushed in high humidity cycles.
Check the archives - April this year. under "string seating" for the full
rundown. 



>I'm curious, with any amount of downbearing and the strings under tension,
>when a force pushes against the strings increasing tension, wouldn't the
>weakest link give in? Surely the string part way up the pin has less to hold
>it there under these circumstances? Unless they've cut themselves a notch to
>hold onto.
>Having not followed all your theories regarding string climb on bridge pins,
>though accepting this occurs, I'm wondering how much influence the vibrating
>of the string itself has on this.

Again, check the archives. All of this was covered.



>Could it be that the most flexible termination point in the vibrating
>string's path, the front bridge pin, having the greatest string movement
>occurring, and consequently first go at dampening the vibration, have enough
>energy occurring for the string to lift off the bridge and climb the pin
>regardless of pin angle and stagger angle?

Archives.



>>I'm beginning to suspect that we went through a lot of years not knowing
>>squat about why and how pianos go out of tune.
>
>Only beginning Ron?

Sure! I'm not done yet, and I hope the rest of us aren't either.

Ron N


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