<html xmlns:v="urn:schemas-microsoft-com:vml" 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=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="country-region"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PostalCode"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="State"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style>  </head> <body bgcolor=white lang=EN-US link=blue vlink=purple> <div class=Section1> I don’t have a hard scientific model, just plenty of anecdotal evidence that the moisture does somehow get into the pinblock. I suspect that the mode of arrival is not air, but the surrounding wood. The wood acts as one giant wick: introduce moisture in on area and it spreads throughout. <o:p></o:p> <o:p> </o:p> <div> Dean<o:p></o:p> <u1:PersonName u2:st="on">Dean May</u1:PersonName>             cell 812.239.3359 <o:p></o:p> PianoRebuilders.com   812.235.5272 <o:p></o:p> <u1:place u2:st="on"><u1:City u2:st="on"><st1:place w:st="on"><st1:City w:st="on">Terre Haute</st1:City></u1:City> <u1:State u2:st="on"><st1:State w:st="on">IN</u1:State></st1:State>  <u1:PostalCode u2:st="on"><st1:PostalCode w:st="on">47802</u1:PostalCode></st1:PostalCode></st1:place></u1:place><o:p></o:p> </div> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Mark Bolsius Sent: Saturday, February 17, 2007 8:31 PM To: '<st1:PersonName w:st="on">Pianotech List</st1:PersonName>' Subject: DC effectiveness - supplementary question<o:p></o:p> </div> <o:p> </o:p> Hi all,<o:p></o:p> <o:p> </o:p> I distribute DC in <st1:country-region w:st="on">Australia</st1:country-region> – where we have a huge mix of climatic conditions, much the way you do in the <st1:place w:st="on"><st1:country-region w:st="on">US</st1:country-region></st1:place> but without quite the volume of snow you guys get…! What we are talking about here is frequently brought up by techs here.<o:p></o:p> <o:p> </o:p> I have always pondered the ability of the DC system in a grand to really cover controlling the moisture in a pinblock. In an upright, it’s easy, everything is in the same space. I realise that you are trying to achieve this when you talk about undercovers and string covers and piano covers – unifying the DC controlled space, but how can this possibly be effective for the pinblock when it is so far removed from the system? Having sufficient ‘controlled’ air moving to and surrounding the pinblock to then permeate the block and change the EMC seems almost impossible to me. I don’t have hard numbers on this, it’s merely my bush logic being applied –so I’d value any input at this point.<o:p></o:p> <o:p> </o:p> I know that some years ago Bob Mair at DC played with the idea of holes in the belly rail and computer type fans to circulate air from under the piano into the action cavity and therefore assisting the pinblock too, but this was ruled out due to the extraneous noise factor – it was considered unacceptable by just about everyone who heard it.<o:p></o:p> <o:p> </o:p> Other than that – how can sufficient control for the pinblock be achieved short of a dual tank system in an enclosed piano cabinet?<o:p></o:p> <o:p> </o:p> Looking forward to your thoughts<o:p></o:p> <o:p> </o:p> Mark Bolsius<o:p></o:p> <div> <o:p> </o:p> </div> </div> </body> </html>