<!doctype html public "-//W3C//DTD W3 HTML//EN"> <html xmlns:o="urn:schemas-microsoft-com:office:office" = xmlns:w="urn:schemas-microsoft-com:office:word" = xmlns:st1="urn:schemas-microsoft-com:office:smarttags" = xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; = charset=us-ascii"> <meta name=ProgId content=Word.Document> <meta name=Generator content="Microsoft Word 10"> <meta name=Originator content="Microsoft Word 10"> <link rel=File-List href="cid:filelist.xml@01C4D192.90F285E0"> <title>Re: [CAUT] Organs and RH</title> <o:SmartTagType = namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style>  </head> <body lang=EN-US link=blue vlink=purple = style='tab-interval:.5in'> <div class=Section1> Hi = Geoffrey,<o:p></o:p> <o:p> </o:p> Glad to know I’m not the only = one with this predicament!<o:p></o:p> <o:p> </o:p> I need to get with the organ man = and see what he thinks will be best for the organ. This is a very expensive = organ so the school may want to reconsider a room RH control device. I know = little about organs, but what you say makes sense. <o:p></o:p> <o:p> </o:p> Thanks for your = feedback,<o:p></o:p> <st1:PersonName>Jim = Busby</st1:PersonName> BYU<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> -----Original = Message----- From: = caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] On = Behalf Of Geoffrey Pollard Sent: Tuesday, November = 23, 2004 6:20 PM To: College and = University Technicians Subject: Re: [CAUT] = Organs and RH <o:p> </o:p> <div> Hi Jim,<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> We have a similar situation at the Sydney Conservatorium - organ and harpsichord in the same room. It is on the = north side of the building and sun streams through the windows especially in = summer ( southern hemisphere, for those to whom this sounds wrong!), and plays = havoc with the RH and temperature. There is AC but no humidity control for the = room.<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> We have as much if not more trouble with the = organ tuning, due to the RH and temp changes, than with the harpsichord. Organ = tuning is much less frequent and more expensive, so the organ is in poor shape = a lot of the time. As you may know, when RH and temp change, the pitch of = metal pipes and wooden pipes move in opposite directions  - = **%$@!<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> Regarding airflow through the organ, I don't = know how it affects the overall room condition but I have been told by an organ = builder that the forced flow of low RH air through an organ will lead to rapid = damage to wooden pipes.<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> Our fix is to lock the AC control at 21 = degrees and put tinting film on the windows.<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> I too have my doubts as to the effectiveness = of a DC system under the harpsichord. As cost is the issue, even a smaller, = therefore cheaper, room unit will minimise the swings. Not perfect, but perhaps no = longer damaging to timber and somewhat more stable = tuning.<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> The college may not believe that one = harpsichord warrants a room unit, so base your argument on potential damage to the = $360,000 organ and you might get your two birds!<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> Good luck,<o:p></o:p> </div> <div> Geoff Pollard<o:p></o:p> </div> <div> Piano Technician<o:p></o:p> </div> <div> Sydney Conservatorium of = Music<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div>  <o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> <o:p> </o:p> </div> <blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite = cite> List,<o:p></o:= p> </blockquote> <blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite = cite>  <o:p></o= :p> </blockquote> <blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite = cite> Does having a large pipe = organ in the room affect the RH? By that I mean, does all the air passing through = an organ's pipes dry out the air and/or does the pump/bellows compress air = and make more/less moisture?<o:p></o:p> </blockquote> <blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite = cite>  <o:p></o= :p> </blockquote> <blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite = cite> Thanks,<o:p></= o:p> </blockquote> <blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite = cite> Jim Busby = BYU<o:p></o:p> </blockquote> <div> <o:p> </o:p> </div> </div> </body> </html>