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<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=382532417-23072007>Harrisons 'short form' bells are remarably consistent
in shape, in other words he had a formula which he used when designing
them.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=382532417-23072007>I
prefer to think that the nominal is remarkably flat compared with the other
partials.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=382532417-23072007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=382532417-23072007>If
Bill is interested, I have tonals on Saltfleetby All Saints (5 of 1799), Sutton
on Trent (5 of 1825) & Whitwood (3 of 1830) as well as dias &
weights.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=382532417-23072007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=382532417-23072007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=382532417-23072007>GAD</SPAN></FONT></DIV>
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face=Tahoma size=2><BR><BR></FONT> </DIV>
<DIV id=ygrp-text>
<P><FONT face=Arial color=#0000ff></FONT><BR>The only Harrison bells I have
analysed, so far, are the eight at <BR>Castleton. The trebles are fairly
typical old-style. The tenors are <BR>remarkable - roughly the samne height as
the trebles, judged by eye, <BR>but with much wider mouths. The tenors have
the same upper partial <BR>structure as the trebles (which is why they have
strike notes) but <BR>lower partials which are astonishingly sharp. Some of
the tierces <BR>are a sharp augmented fourth, almost a fifth, with primes two
<BR>semitones sharp. Hence the unique sound.<BR><BR>RB> Harrison knew about
[the need for large mouths to give a large <BR>radiating area] and produced
bells with very large diameter mouths <BR>for the weight, they do
radiate.<BR><BR>Actually, the large mouths are needed to get the strike pitch
<BR>correct. The nominal, superquint and octave nominal must have 6, 8 <BR>and
10 antinodes around the soundbow. Broadly, a longer soundbow <BR>circumference
is needed to get the lower frequency nominal needed. <BR>If the bells had
smaller mouths, they would have a higher pitch.<BR><BR>Can low-pitched light
bells be designed?<BR><BR>AW> Handbells?<BR><BR>Handbells pitch by the
lowest partial rather than the half-nominal, <BR>for physical reasons to do
with the arrangement of their partials. <BR>Also, the much thinner wall gives
a low pitch for the same soundbow <BR>circumference. That's why they have such
a low note with so little <BR>metal / physical size.<BR><BR>RB> Computer
generation of profiles ...<BR><BR>The ausbell work by Neil McLachlan and crew
is very clever indeed <BR>but has different tonal objectives than conventional
bell <BR>production. Also (based on recordings I have heard), close control
<BR>of manufacturing tolerances would be needed to give the accurate
<BR>partial frequencies and absence of doublets we have come to
expect.<BR><BR>So, I suspect the answer to the above question is: no, not if
you <BR>want them to sound like bells. Someone needs to prove me wrong and
<BR>save us all a lot of money!<BR><BR>Bill H<BR><BR></P></DIV><!--End group email --></BLOCKQUOTE></BODY></HTML>