Humidity Change and Unisons

[Don]

Hi John,

I can see temperature affecting the plate but not humidity. I am still
having trouble visualizing what you are trying to tell me. Interesting
suggestion that the duplex is a stability device. More worms anyone?

At 09:46 PM 08/17/2000 -0400, you wrote:
>At 08:36 PM 08/17/2000 Don Rose stated
>
>Throw away the soundboard and bridge and just have your strings and plate.
If the plate doesn't swell with humidity, although I think it might, it
will at least be tilted somewhat through expansion of that upon which it
rests. The plate edge beyond the bridge keeps getting longer, not by note
but by string. This is on both grands and uprights and that's why your
right string is found to be at a greater tension than the left.
>
>This may not be as extreme where you have those "adjustable" duplux
doohickeys on some grands though.
>
>John Lillico, RPT
>Oakville, Ontario
>
>
>
>
>
Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.

Tuner for the Saskatchewan Centre of the Arts

drose@dlcwest.com
http://donrose.htmlplanet.com/

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