Over sharp treble

[Don]

Hi Ron,

I have observed the tuning pins moving on some less than spectacular pianos
due to humidity changes. Perhaps that's one of the "missing" parts of the
equation?

At 07:41 AM 01/11/2004 -0600, you wrote:
>
>>Hi Ron,
>>
>>If this is so why are the tenor plain steel strings the very most affected
>>by humidity change?
>
>Hi Don,
>The plain wire low tenor strings are typically at a much lower break%, and 
>go out of tune farther for a given tension change. Wrapped strings at a 
>higher break% down there are much less reactive. They are also in an area 
>of the board that DOES change crown height more than the treble. 
>Interestingly, the low tenor changes more than the math of the bridge pin 
>angle, bridge height, and soundboard crown height account for, so more is 
>happening here than is being covered by our simple speculations.
>
>Ron N
>
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives
>
>

Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
Non calor sed umor est qui nobis incommodat

mailto:pianotuna@accesscomm.ca		http://us.geocities.com/drpt1948/

3004 Grant Rd.
REGINA, SK
S4S 5G7
306-352-3620 or 1-888-29t-uner