temp change=how much pitch change?

[Bob Hull]

I don't know what "damp-chaser" means either nor do I
follow Diane's tune it 4 cents flat.  

A chart of temperature, humidity and pitch change
results may be somewhat useful in terms of general
tendencies however, I think that each piano and each
room will react a little differently.  The speed of
the temperature change, the reason for the temperature
change (lights or hvac and type of hvac) all will have
an impact the the amount of pitch change. Also, how
long the piano has been at a previous temperature
makes a difference.  Plate is a large heat sink and
slow to change compared to  strings.  
   A specific example in my own customer base includes
a very delicate tuning situation with a Hamburg D in a
small recital hall.  The lights in that room will run
up the temperature quite a ways before the thermostat
will react.  Due to the small size of the room I
cannot allow the temperature to change over .5 degrees
without changing the  pitch level drastically.  I keep
a thermometer on the piano so I can jump up and adjust
the lights to keep the temperature close enough.

Bob Hull

--- "John M. Formsma" <john at formsmapiano.com> wrote:

> Huh? maybe a little more elaboration.
> 
> JF
> 
> pianolover 88 wrote:
> > Dampp-chaser.
> >
> > Terry Peterson
> 



 
____________________________________________________________________________________
No need to miss a message. Get email on-the-go 
with Yahoo! Mail for Mobile. Get started.
http://mobile.yahoo.com/mail