<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=us-ascii"> <META content="MSHTML 6.00.2600.0" name=GENERATOR></HEAD> <BODY> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2>Hello Roger, and all</FONT></SPAN></DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2>I confirm that any time I've seen complains about duplex noises, or/and = duplex muted, the problem was :</FONT></SPAN></DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2>Bad frame bedding robbing energy from the action or giving a too  noisy = tone.</FONT></SPAN></DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2>Hammers hardened by use, not enough voicing, or big grooves in = the crown.</FONT></SPAN></DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2>A fast check of the regulation, plus a fast needling to allow for the lower = portions of the hammer to give strength to the tone, generally is enough.</FONT></SPAN></DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2>Even if the string mating is not perfect, the strings are rusty or old, if = the hammers have some energy left (generally the case with Yamahas) , the = tone can be made acceptable for the customer, and what was noisy become lively.</FONT></SPAN></DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2>Regards.</FONT></SPAN></DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2>Isaac OLEG</FONT></SPAN></DIV> <DIV><SPAN class=304040521-03092002><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px = solid"> <DIV class=OutlookMessageHeader dir=ltr align=left><FONT = face=Tahoma size=2>-----Message d'origine-----<BR><B>De :</B> = owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]<B>De la part de</B> jolly roger<BR><B>Envoyé :</B> mardi 3 septembre 2002 = 04:03<BR><B>À :</B> pianotech@ptg.org<BR><B>Objet :</B> Re: Tuning the Duplex (was ...Capo)<BR><BR></FONT></DIV><FONT size=3>Hi = Jason,<BR>          &nb= sp;     Once the hammers start to get very hard on most Yamaha's, the forward = duplex starts to get very aggressive and zingy.  Reshape the hammers if = needed, and deep needle the shoulders, between 10-11 o'clock.  About 6 = shots per shoulder at the start of the capo section, tapering to about 2 or 3 in = the top treble,<BR>If you reshape, remember to raise the hammer line to = restore after touch.  So figure on a half days work, to shape, voice and touch = up the regulation.<BR>Lifting all the strings in this section can also help = minimize some of the duplex noise.<BR><BR>Regards Roger<BR><BR>At 05:21 PM = 9/2/02 -0700, you wrote:<BR> <BLOCKQUOTE class=cite cite="" type="cite">Gordon, thanks for = the correction. I apologize for terminology slippage after lo these many = years (last time I tuned a duplex, it was when I was restringing a = Steinway in 1979, and I had the luxury of new pre-tuned strings at a lower = tension). The question remains: <BR>What's the current *best practice* regarding = tuning of the duplex? Do you routinely check and adjust? Can I just take a = hammer and screwdriver and tap it forward/back until it is in tune, and then = tune the piano? Or is it necessary to lower string tension first? Or should I = use a different tool such as a hammer shank to tap the = bar?<BR> <BR>And next question: should I remove the muting felt from the c4-g4 area of the = duplex?<BR><BR>----- Original Message ----- <BR>From: "gordon = stelter" <lclgcnp@yahoo.com><BR>To: <pianotech@ptg.org><BR>Sent: = Monday, September 02, 2002 11:41 AM<BR>Subject: Re: Tuning the = Capo<BR><BR><BR>| Sorry, Jason, but the "Capo Bar" is the solid bar cast<BR>| into the = plate which provides the forward string<BR>| speaking length termination = point, and downbearing for<BR>| the bridges ( as oppsed to the agaffes = lower down the<BR>| scale ) I believe you are referring to the duplex <BR>| (or = triplex) bars.<BR>| <BR>| --- Jason Kanter = <jkanter@rollingball.com> wrote:<BR>| > Greetings, list. I have met a Yamaha C-series = grand<BR>| > that I will be tuning next week. Took the ETD<BR>| > = "voice-print", played it, and examined the action.<BR>| > <BR>| > This piano = has a cap d'astro bar in both the treble<BR>| > and tenor sections. = Owner complains that sometimes<BR>| > the piano has a "ring" that = sounds almost like a<BR>| > telephone. I checked the tuning of the capo and = they<BR>| > are all way off. The highest section, where the capo<BR>| > = section is equal to the speaking section and<BR>| > therefore should be a = unison, is off by more trhan a<BR>| > semitone. There is no place in the = whole capo that<BR>| > is in tune. And there is muting = string-braid-felt<BR>| > that has been inserted to quiet the lowest 7-8 notes<BR>| > = of the capo (about c4 to g4).<BR>| > <BR>| > My question to you is: = what's the current best<BR>| > practice regarding tuning of the capo? Do = you<BR>| > routinely check and adjust? Can I just take a = hammer<BR>| > and screwdriver and tap it forward/back until it is<BR>| > in = tune, and then tune the piano? Or is it necessary<BR>| > to lower string = tension first? Or should I use a<BR>| > different tool such as a hammer = shank to tap the<BR>| > bar?<BR>| > <BR>| > And next question: = should I remove the muting felt<BR>| > from the c4-g4 area of the = capo?<BR>| > <BR>| > Inquiring minds want to know.<BR>| > <BR>| > Thanks = in advance<BR>| > <BR>| > <BR>| > || ||| || ||| || ||| || ||| = || ||| || ||| || ||| ||<BR>| > |||<BR>| >  jason kanter * piano = tuning * piano teaching<BR>| >  bellevue, wa * 425 562 4127 * cell = 425 831 1561<BR>| >  orcas island * 360 376 2799<BR>| > || ||| || = ||| || ||| || ||| || ||| || ||| || ||| ||<BR>| > |||<BR>| > <BR>| = > <BR>| > <BR>| <BR>| <BR>| __________________________________________________<BR>| Do You = Yahoo!?<BR>| Yahoo! Finance - Get real-time stock quotes<BR>| <A href="http://finance.yahoo.com/" eudora="autourl">http://finance.yahoo.com</A><BR>| </FONT></BLOCKQUOTE><BR></BLOCKQUOTE></BODY></HTML>