strict temperature effects

Keith McGavern kam544@ionet.net
Thu, 12 Mar 1998 15:27:51 -0600 (CST)


>... recently had an experience with an old upright that
>sat out overnight and got real cold..near freezing.  The piano was moved
>into a theatre where I was waiting to tune.  I checked the pitch and it was
>about 30 cents or so flat. I raised the pitch and decided to come back
>later and tune it after the temp had equalized.  The plate was very cold!
>When I came back a couple hours later the piano had gone 25 cents or so
>sharp!...
>Dick Beaton RPT Helena, MT

Had a similar experience in a church santuary, but on an organ.  Extremely
cold environment when I arrived.  Organ measured minus 5000 cents
<g>......piano measured right on.  Heat was turned on.  Half hour later the
organ came right up to pitch...piano stayed right on.

I wouldn't have believed it if I hadn't been there.  Very weird moment for me.

Keith A. McGavern
kam544@ionet.net
Registered Piano Technician
Oklahoma Chapter 731
Piano Technicians Guild
USA




This PTG archive page provided courtesy of Moy Piano Service, LLC