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<DIV><FONT face=Arial size=2>Michael-</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I like your sense of evil!</FONT></DIV>
<DIV><FONT face=Arial size=2>It's the wisdom you get from surviving in the
trenches.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ed Sutton</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=jorge1ml@cmich.edu href="mailto:jorge1ml@cmich.edu">Michael
Jorgensen</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=caut@ptg.org
href="mailto:caut@ptg.org">College and University Technicians</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, May 16, 2007 11:05
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [CAUT] Killer
half-octave</DIV>
<DIV><BR></DIV><FONT face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 12px">David,<BR> I assume you’ve
tried super diligence for just those weak notes on everything action, hammer,
restringing, and bridge pin, tone bell, to mask this soundboard weak spot.
<BR> Warning Evil improper and surely
controversial tricks ahead that might help: Tune as many rear duplexes
found in the tenor and mid-range as can be tuned to the exact pitches of the
weak killer octave notes using Pitchlock couplers or by adding weight to the
string segments thus bringing their pitches down. Phase out dampers by
making top few dampers work poorer and poorer until the top one is almost as
bad as no damper. For weak notes only: Increase stiffness of the
shanks by painting them with thin CA glue. Increase the blow
distance and keydip slightly for more power. Add graduated and even
weight to hammers using flexible blobs of glue hidden in the coves and a have
tighter center pining and tighter rep springs. Don’t be too
diligent on power producing things in other areas of the piano but super
diligent for those weak notes. Replace just those
seven hammers/shanks with whatever hammers produce most power and voice
to match, even if it looks ugly. <BR>-Mike
Jorgensen<BR> <BR><BR><BR><BR><BR><BR>On 5/16/07 8:47 AM,
"Porritt, David" <dporritt@mail.smu.edu> wrote:<BR><BR></SPAN></FONT>
<BLOCKQUOTE><FONT size=5><FONT face="Times New Roman"><SPAN
style="FONT-SIZE: 16px">Esteemed colleagues:<BR> <BR>Our NY D, (1983)
has developed – in the last year or so – a killer half-octave from about A#5
– E6. I’ve added some mass to the bridge right under C6 and that
helped <I>a little </I>but the problem remains. I’ve been searching
through the archives this morning checking for any further heroic measures I
could take within the confines of my budget. <BR> <BR>What’s the
general consensus of opinion about the “Treble Tone Resonator” that Pianotek
sells? While my current budget precludes a full remanufacturing I
think I can manage the $155.00 for that! However, I don’t want to
spend even that – nor expend the time installing it – if it
wouldn’t help. <BR> <BR>Any ideas, suggestions, experience with
it
etc.?????<BR> <BR>dave<BR> <BR>__________________________________<BR>David
M. Porritt, RPT<BR>Meadows</SPAN></FONT></FONT><FONT
face="Verdana, Helvetica, Arial"><SPAN style="FONT-SIZE: 12px"> School of
the Arts<BR></SPAN></FONT><FONT size=5><FONT face="Times New Roman"><SPAN
style="FONT-SIZE: 16px">Southern Methodist
University<BR>Dallas</SPAN></FONT></FONT><FONT
face="Verdana, Helvetica, Arial"><SPAN style="FONT-SIZE: 12px">, TX
75275<BR></SPAN></FONT><FONT size=5><FONT face="Times New Roman"><SPAN
style="FONT-SIZE: 16px">dporritt@smu.edu<BR> <BR></SPAN></FONT></FONT><FONT
face="Verdana, Helvetica, Arial"><SPAN
style="FONT-SIZE: 12px"><BR></SPAN></FONT></BLOCKQUOTE><FONT
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