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<DIV><FONT face=Arial size=2>Hi list, hi Ron.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Just one stupid question for Ron.</FONT></DIV>
<DIV><FONT face=Arial size=2>Ron, I truly appreciate your work and effort in
piano improvement.</FONT></DIV>
<DIV><FONT face=Arial size=2>But reading this, one question comes to my mind :
</FONT></DIV>
<DIV><FONT face=Arial size=2>do you really believe that Bechstein engineers were
not aware of the % of breaking strength of the tenor strings of their pianos
? I suppose not. So the next question is : why the hell those
educated people did chose to implement such a design (the tension drop in low
trebble bridge) on such an expensive piano ?</FONT></DIV>
<DIV><FONT face=Arial size=2>Just wondering.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Best regards.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Stéphane Collin.</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=concertpianoservice@planet.nl
href="mailto:concertpianoservice@planet.nl">Concert Piano Service</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">Pianotech List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, January 22, 2007 8:40
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: A tenor bridge
conversion</DIV>
<DIV><BR></DIV><BR>
<DIV>
<DIV>On 22-jan-2007, at 1:52, Ron Overs wrote:</DIV><BR
class=Apple-interchange-newline>
<BLOCKQUOTE type="cite">
<DIV style="MARGIN: 0px">Hi all,</DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">I've just loaded a couple of images onto my
webspace which show the layout for a tenor bridge conversion of a Bechstein
model C grand, and an image of the new tenor bridge in place prior to
stringing.</DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">Here is an image link taken at the layout planning
stage;</DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px"><A
href="http://members.optusnet.com.au/ronovers/bech_c_tenor1.jpg">http://members.optusnet.com.au/ronovers/bech_c_tenor1.jpg</A></DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">Here is an image link, taken last Friday which
shows the finished tenor bridge in place, awaiting strings.</DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px"><A
href="http://members.optusnet.com.au/ronovers/bech_c_tenor2.jpg">http://members.optusnet.com.au/ronovers/bech_c_tenor2.jpg</A></DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">The original Bechstein C (circ 1953) was one of the
most outstanding examples of a poor scale I've ever measured in a mid sized
grand. The tension dropped down to around 18% at note E20 (the lowest note
on the long bridge). To rectify this problem, a new tenor bridge was
designed from the first original trichord plain note, E20, up to note D#31.
The new lowest plain-strung trichord is at a respectable tension of 36%.
This will transform the model C from one of the worst crosses in the
business, improving it to the point where it is about equivalent to the
cross of a model D Steinway (in terms of percentage of tension deviation -
the lower the deviation the better the tuning stability). Should have it
strung and playing in a couple of weeks.</DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV>
<DIV style="MARGIN: 0px">Ron O.</DIV>
<DIV style="MIN-HEIGHT: 14px; MARGIN: 0px"><BR></DIV></BLOCKQUOTE></DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>Hi Ron,</DIV>
<DIV>I have a question :</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>You cut off the treble bridge in the tail. Did you do that because that
last part of that treble bridge is so close to the rim?</DIV>
<DIV>I worked on a brand new Bechstein C and I noticed that those first treble
notes (nr 21 to appr. nr 30 sounded weird and were difficult to voice
correctly, as usual).</DIV>
<DIV>I also wonder what kind of string thickness you use on that new bridge
you built. Do they get thicker in size because they are shorter?</DIV>
<DIV><BR class=khtml-block-placeholder></DIV><BR>
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<DIV>friendly greetings</DIV>
<DIV>from</DIV>
<DIV>André Oorebeek</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>Antoni van leeuwenhoekweg 15</DIV>
<DIV>1401 VW Bussum</DIV>
<DIV>the Netherlands</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>tel : 0031 35 6975840</DIV>
<DIV>tel : 0031 652388 008</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>where music is, </DIV>
<DIV>no harm can be</DIV><BR
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