<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=windows-1250"> <META content="MSHTML 6.00.2900.2963" name=GENERATOR></HEAD> <BODY style="WORD-WRAP: break-word; khtml-nbsp-mode: space; khtml-line-break: after-white-space"> <DIV><SPAN class=437060619-18112006><FONT face=Arial color=#0000ff size=2>I was on a stage with the house lights off I had a hygrometer I checked the humidity and it was 62 percent. I started tuning and it was going fine then someone turned all the house lights on and it got really hot. Then I checked the hygrometer which I had sitting on the piano and it started dropping and it went all the way to zero and my tuning fell completely apart. So I retuned it. and hoped for the best.I install a lot of climate control systems in Tulsa area and they really  help stability, but not very much in this situation.</FONT></SPAN></DIV> <DIV> </DIV> <DIV><FONT face=Arial size=2>Les Fitzpatrick </FONT></DIV> <DIV><FONT face=Arial size=2><FONT size=2> <P><http://www.fitzsupershop.com</P></FONT></FONT></DIV> <DIV><FONT face=Arial size=2>Piano Technician</FONT></DIV> <DIV><FONT face=Arial size=2>ham call sign </FONT><FONT face=Arial size=2>K5FPT</FONT></DIV> <BLOCKQUOTE> <DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> caut-bounces@ptg.org [mailto:caut-bounces@ptg.org]<B>On Behalf Of </B>Jeff Tanner<BR><B>Sent:</B> Friday, November 17, 2006 10:53 AM<BR><B>To:</B> College and University Technicians<BR><B>Subject:</B> Re: [CAUT] Piano Garage for Temperature & Humidity Control<BR><BR></FONT></DIV><BR> <DIV> <DIV>On Nov 16, 2006, at 12:12 PM, <A href="mailto:reggaepass@aol.com">reggaepass@aol.com</A> wrote:</DIV><BR class=Apple-interchange-newline> <BLOCKQUOTE type="cite"> <P style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" face=Helvetica size=3>I don't have any personal experience with this, but I would imagine that taking a piano out of an "ideal" environment into one that has substantially more or less relative humidity (+/- 25% !) just hours before the concert would DEstabilize it. Anyone out there have experience with this?</FONT></P></BLOCKQUOTE></DIV><BR> <DIV>I think it depends.  We had a feasibility study for a mid size concert hall done about 5 years ago.  I requested a climate controlled closet for pianos.  The architect claimed he'd built lots of performance venues and made the claim that "most" places preferred to have the piano be at whatever the hall climate was.  I think once you turn on the hot lights, it really doesn't matter.</DIV> <DIV><BR class=khtml-block-placeholder></DIV> <DIV>Our pianos stay on stage in our small recital hall, even though we have closets designed and included specifically for the pianos.  I know I've seen changes in our piano just from turning on the "house" lights during the day, and the change is significant enough that I changed my tuning time from first thing in the morning to just before recitals begin.  I suspect you are more likely to  have a temperature change than much of a humidity difference, and the piano will react almost immediately to temperature.  So I don't see how you can get around some degree of instability either way.</DIV> <DIV><BR class=khtml-block-placeholder></DIV><BR><BR> <DIV><SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 12px Helvetica; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; border-spacing: 0px 0px; khtml-text-decorations-in-effect: none; apple-text-size-adjust: auto; orphans: 2; widows: 2"> <DIV>Jeff Tanner, RPT</DIV> <DIV>University of South Carolina</DIV> <DIV><BR class=khtml-block-placeholder></DIV><BR class=Apple-interchange-newline></SPAN></DIV><BR></BLOCKQUOTE></BODY></HTML>