[pianotech] pitch of a piano

[Paul McCloud]

Marshall:
I don't know which universe you live in, but in my world, if the string temperature drops, the pitch goes UP, and if the temperature of the string goes DOWN, the pitch goes DOWN.  Take your ETD or whatever you use to tune with, and a hair dryer.  Measure the pitch of a string before and after you heat it.  I'll bet it'll go flat after you heat it.  Try it.  It's also why using heat melts iron and steel, it gets loose and bends when hot, and stiff when it's cold.  Cold contracts, heat expands.
Hope that helps.
Paul McCloud
somewhere in an alternate universe
called San Diego

----- Original Message -----
From: "Marshall Gisondi" <pianotune05 at hotmail.com>
To: pianotech at ptg.org
Sent: Sunday, February 24, 2013 5:28:53 PM
Subject: [pianotech] pitch of a piano


Hi Everyone, 
I thought the pitch of a piano rises when the temp rises or goes sharp and when it's cold goes flat? 
Marshall 


Marshall Gisondi 
MARSHALL'S PIANO SERVICE 
215-510-9400 
http://www.phillytuner.com