<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=iso-8859-1" = http-equiv=Content-Type> <META content="MSHTML 5.00.2919.6307" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV>The SAT III has two overpull settings to choose from. 25% for tenor = and 33% for treble. For the bass, if it is say 30 cents flat, I measure until it = reads 20 cents flat and then calculate the 25% overpull based on 20 cents = flat. This 2/3 value works real good for me for the bass and is easy to do. I'll = cut the overpull down a little at about F7 or so, and use the 25% = overpull so the high treble doesn't get too sharp. On a piano that is evenly = below pitch, the SAT III gets me easily within a cent or two of my target. There are = often center strings and unisons that I will not even change during the fine tuning.</DIV> <DIV> </DIV> <DIV>Terry Farrell<BR>Piano Tuning & Service<BR>Tampa, Florida<BR><A = href="mailto:mfarrel2@tampabay.rr.com">mfarrel2@tampabay.rr.com</A></DI= V> <BLOCKQUOTE style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: = 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B> <A href="mailto:DGPEAKE@AOL.COM" = title=DGPEAKE@AOL.COM>DGPEAKE@AOL.COM</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = href="mailto:pianotech@ptg.org" title=pianotech@ptg.org>pianotech@ptg.org</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, December 01, 2000 = 9:48 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Variable overpull = percentage (was: Finishing where you started)</DIV> <DIV><BR></DIV><FONT size=2>In a message dated 12/1/00 6:50:36 AM = Pacific Standard Time, <BR><A = href="mailto:michel_lachance@hotmail.com">michel_lachance@hotmail.com</= A> writes: <BR><BR><BR><BR> <BLOCKQUOTE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; = MARGIN-RIGHT: 0px; PADDING-LEFT: 5px" TYPE="CITE">No offense meant Dave and I thank you for straighten = things up. I have owed <BR>a SAT II and I know that the overpull percentage is = fixed for that machine <BR>(20% throughout or so).  If it is = different for the SAT III, I beg you to <BR>update my knowledtge on that respect. <BR><BR>For example, if both strings each side of the tenor break = are 10 cents <BR>flat, <BR>RCT will raise the wound string by 12% over = target pitch, and the lowest <BR>plain wire string by 32% over target = pitch, because practice tells us that <BR>you need different overpull on = those strings for an optimal pitch <BR>correction.  That's why you = have to tell RCT where the lowest plain wire <BR>note is before you start = tuning.  The overpull percentage varies throuhout <BR>the keyboard (as = well as the pitch offsets...) depending of the section of <BR>the piano, = according to statistics made on actual experiments on pitch <BR>raises. =  And you even have the option to change the overpull percentage <BR>chart if = you find that a particular piano reacts differently to an overpull. = <BR><BR>So, for the sake of my own education, I would be grateful you tell me what = <BR>the variable overpull percentages are on a SAT III and how you tell the <BR>machine where the lowest plain wire note is. <BR><BR>Regards, <BR><BR>Michel Lachance, RPT <BR><BR></BLOCKQUOTE><BR><BR><BR><BR>I = believe the overpull is 25% of the 2nd partial. Someone please correct me = <BR>if I am wrong. (Jim, please pitch in). The SAT 3 is the same. I usually = <BR>measure the lowest note of the plain wire, offset for pitch raise, and = <BR>re-measure every octave or so.  I have no problems with doing a pitch raise <BR>using this method.   <BR><BR>Dave Peake, RPT <BR>Portland = Chapter <BR>Oregon City, OR <BR>www.davespianoworks.locality.com</FONT> </BLOCKQUOTE></BODY></HTML>