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<DIV>
<DIV> Trent</DIV>
<DIV> Thanks I missed it. I don't read everything.</DIV>
<DIV> Dale</DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><=
FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000
size=2><BR> Hi Dale,<BR> <BR> You=
probably saw this already, but, just in case, Ron Nossaman touched on one
example like you're talking about in a recent post talking about an uprigh=
t
with the break between C3 and C#3, that comes standard with all plain wire=
s on
the long bridge. Ron said (emphasis added):<BR> <BR>&nb=
sp;
"For instance, that 38.75" C#-3<BR> with plain wire
trichord will be at about 24% of breaking tension<BR> (regard=
less
of wire size, within reason). That's pretty low, and will be<BR> &nb=
sp;
very reactive to tension changes resulting from humidity
fluctuations,<BR> meaning it will go out of tune quicker and
farther than unisons farther<BR> up-scale, or down scale in t=
he
high bass. Tension will be determined by the<BR> wire size us=
ed
there. For instance, unison tension with #20 will be about<BR>  =
;
404 lbs, or about 369 lbs with #19. Going to a bichord unison, dropping
two<BR> or three half sizes for the core, and figuring wrap t=
o
get back near the<BR> unison tension that was originally ther=
e
will raise the break% to around<BR> 40%. That's going to be a=
more stabile unison with humidity changes, and<BR> sound bett=
er
too. The trouble is, that puts you at the bottom of the list<BR> &nb=
sp;
of available copper wrap sizes, requiring about a 0.007" wrap to keep
the<BR> tension down around where it was with the plain strin=
gs.
Arledge uses as<BR> small as 0.006" for copper wrap. That tak=
es
care of C#-3, if the impedance<BR> and inharmonicity connects=
reasonably with the high bass. Now you'll<BR> probably want t=
o go
2-4 notes higher with wrapped bichords to blend the<BR> imped=
ance
and inharmonicity into the rest of the treble. What happens? You<BR> =
maybe need 0.006" wrap for D-3, and smaller than is available for t=
he
next<BR> one or three. There's the problem, and the reason th=
is
doesn't always work<BR> that well, and the reason for transit=
ion
bridges. The speaking lengths are<BR> too long at that pitch =
for
wrapped strings. "<BR> <BR> Maybe that'll help g=
et
your discussion going. ( : <BR> <BR>
Regards,<BR> <BR>
Trent</FONT></BLOCKQUOTE></DIV>
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