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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>How does it raise the impedence characteristics too much? Why do you think it raises the impedence characteristics too much? How much is too much and how much is just enough? <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Since we are dealing with mass and stiffness, what would be the best combination for a treble bridge?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Should those characteristics for a bridge vary from piano to piano, depending on the ribbing, panel thickness, etc. etc.?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Will Truitt<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] <b>On Behalf Of </b>David Love<br><b>Sent:</b> Thursday, November 01, 2012 6:08 PM<br><b>To:</b> pianotech@ptg.org<br><b>Subject:</b> Re: [pianotech] cutting down a MH bridge<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I didn’t state but I have always felt that the MH bridge was too massive and raised the impedance characteristics too much. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>David Love<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://www.davidlovepianos.com">www.davidlovepianos.com</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:pianotech-bounces@ptg.org">pianotech-bounces@ptg.org</a> [<a href="mailto:pianotech-bounces@ptg.org">mailto:pianotech-bounces@ptg.org</a>] <b>On Behalf Of </b>Dale Erwin<br><b>Sent:</b> Thursday, November 01, 2012 2:33 PM<br><b>To:</b> <a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a><br><b>Subject:</b> Re: [pianotech] cutting down a MH bridge<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Comic Sans MS";color:navy'>Did I miss why you want to cut it down /remove mass<o:p></o:p></span></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><b><span style='font-size:7.5pt;font-family:"Comic Sans MS";color:mediumblue'>Dale Erwin R.P.T.<br></span></b><b><span style='font-size:7.5pt;font-family:"Comic Sans MS";color:green'>Erwin's Piano Restoration Inc.</span></b><b><span style='font-size:7.5pt;font-family:"Comic Sans MS";color:mediumblue'><br></span></b><b><i><span style='font-size:7.5pt;font-family:"Comic Sans MS";color:black'>Mason & Hamlin/Steinway/U.S. pianos<br></span></i></b><b><i><span style='font-size:7.5pt;font-family:"Comic Sans MS";color:cornflowerblue'><a href="http://www.Erwinspiano.com">www.Erwinspiano.com</a></span></i></b><b><i><span style='font-size:7.5pt;font-family:"Comic Sans MS";color:darkgreen'><br></span></i></b><b><i><span style='font-size:7.5pt;font-family:"Comic Sans MS";color:crimson'>Phone: 209-577-8397</span></i></b><b><i><span style='font-size:7.5pt;font-family:"Comic Sans MS";color:darkgreen'><br></span></i></b><span style='font-size:10.0pt;font-family:"Courier New";color:darkgreen'><br><tt> </tt></span><span style='font-size:10.0pt;font-family:"Courier New";color:navy'><br><tt> </tt></span><span style='font-size:10.0pt;font-family:"Comic Sans MS";color:navy'><o:p></o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Comic Sans MS";color:navy'><o:p> </o:p></span></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>-----Original Message-----<br>From: David Love <<a href="mailto:davidlovepianos@comcast.net">davidlovepianos@comcast.net</a>><br>To: pianotech <<a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a>><br>Sent: Thu, Nov 1, 2012 12:45 pm<br>Subject: Re: [pianotech] cutting down a MH bridge<o:p></o:p></span></p><div id="AOLMsgPart_0_8203852f-8eea-4fcc-9947-4f9b14417664"><pre style='background:white'><tt><span style='color:black'>Or possibly a router. I was trying to figure out how to build and position</span><o:p></o:p></tt></pre><pre style='background:white'><tt><span style='color:black'>a guide so as to keep the cut a constant width through the curves without<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>having to freehand it. <o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'><o:p> </o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>David Love<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'><a href="http://www.davidlovepianos.com" target="_blank">www.davidlovepianos.com</a><o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'><o:p> </o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'><o:p> </o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>-----Original Message-----<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>From: <a href="mailto:pianotech-bounces@ptg.org">pianotech-bounces@ptg.org</a> [<a href="mailto:pianotech-bounces@ptg.org?">mailto:pianotech-bounces@ptg.org</a>] On Behalf<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>Of Terry Farrell<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>Sent: Thursday, November 01, 2012 12:06 PM<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>To: <a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a><o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>Subject: Re: [pianotech] cutting down a MH bridge<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'><o:p> </o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>I'll second what Ron said. And if you do go that route, I know a guy in<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>Florida that makes beautiful laminated bridges.<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'><o:p> </o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>But if I were going to use the original, then yeah, I'd fire up the bandsaw.<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>You should be able to saw it pretty smooth freehand. Or you could make some<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>sort of post on your fence (like a several inch bump - maybe a vertical<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>board of maple rounded on the end at a right angle to the fence) right at<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>the blade - that way you would have a guide for constant thickness and yet<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>it would allow you to change the orientation of the bridge as you go along<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>the curve. You'd probably have to do the doglegs freehand though.<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'><o:p> </o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>Let me know if I can help you.<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'><o:p> </o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>Terry Farrell<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'><o:p> </o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>On Nov 1, 2012, at 2:18 PM, Ron Nossaman wrote:<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'><o:p> </o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>> On 11/1/2012 12:40 PM, David Love wrote:<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>>> I'm putting a new board in a MH piano (AA) and considering trimming <o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>>> that massive 40 mm wide bridge to something more reasonable like <o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>>> 33mm. Has anyone ever done that? What was your method other than <o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>>> careful band saw and a lot of sanding?<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>> <o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>> Make a new one. You'll even get the chance to make a better length<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>progression across the breaks.<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>> Ron N<o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'>> <o:p></o:p></span></tt></pre><pre style='background:white'><tt><span style='color:black'><o:p> </o:p></span></tt></pre></div></div></div></body></html>