<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <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=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@01C548A4.226B2210"> <o:SmartTagType = namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/>  <style>  </style>  </head> <body lang=EN-US link=blue vlink=purple = style='tab-interval:.5in'> <div class=Section1> Until a company comes out with a = monitor that can, say, be inserted into the soundboard/rim/frame to monitor MC, controlling the RH is about all we have.  Since the humidistat is = available in different RH settings, it seems only reasonable that an adjustable one = has its place.  In = <st1:place>Northern California</st1:place>, where the humidifying part of the DC system is rarely = installed, an adjustable humidistat would be ideal.  A simple monitoring over a period of time with a hygrometer with = a min/max memory would give you the information needed to choose the setting that = has the system cycling on for the minimum amount required.  <o:p></o:p> <div> David Love davidlovepianos@comcast.net <o:p></o:p> </div> -----Original = Message----- From: = pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of David Patterson Sent: Sunday, April 24, = 2005 7:30 AM To: richard.ucci@att.net; pianotech@ptg.org Subject: RE: = humidistat <o:p> </o:p> <div> <div> Hi Richard,<o:p></o:p> The adjustable humidistat idea has a few = flaws, in my opinion.<o:p></o:p> It implies that relative humidity is the key = issue for the piano, and reinforces this focus on RH, instead of EMC.  = Technicians often ignore the end result [stability from Equilibrium Moisture Content] in favour of the current situation [relative humidity at = this moment, what is the system doing right now?]. The "adjustable" = idea plays to this misconception a bit.<o:p></o:p> I have big question marks with: the amount of adjustment feasible, actual means of accurately triggering an = adjustment to the cycling point within the device, and its ability to then = achieve those cycling results within the whole system. = <o:p></o:p> Then, you gotta wonder whether we really want = another variable in our "detective work". Sometimes stabilising an instrument is worked on over a long period of time. When we are = baffled by our findings, we become suspicious of what happened while we = were gone. Particularly in a grand, I see many points of trouble but not much = gain to a tweakable control. As it is, it takes fully three spread-out visits = to realise a single provable change on a piano -- one to change something, one for detailed tuning work at A440, and = another to measure and see what happened.<o:p></o:p>  <o:p></o:p> David Patterson, RPT Patterson and Company Exclusively Dampp-Chaser Piano Life Saver Specialists for 15 Years = <o:p></o:p> </div> </div> <blockquote style='border:none;border-left:solid blue = 1.5pt;padding:0in 0in 0in 4.0pt; margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'= > -----Original Message----- From: = richard.ucci@att.net [mailto:richard.ucci@att.net] Sent: Saturday, April 23, = 2005 7:44 PM To: pianotech@ptg.org Subject: = humidistat<o:p></o:p> <div> List,<o:p></o:p> </div> <div>  <o:p></o:p> </div> <div> Is Dampp-chaser planning on bringing out an = adjustable humidistat like the one Moisture King has? Also , can theirs be used = with a dc system?<o:p></o:p> </div> <div> RU/UP<o:p></o:p> </div> </blockquote> </div>  </body> </html>