[Bell Historians] Stretch tuning

Andrew Higson andrew-higson at K2FAT208kop6vg7JAI7M_3I2hL9Ek7ib_vkGkk8wB-3jMSkwc7F_KylqaaJ2TqGvn30V4Mt24NyoY5MM3Ia2BmsdXlVh4g.yahoo.invalid
Mon Dec 3 12:18:18 GMT 2007

That would be tricky as PLT has been dead a while, but it was his idea.
Without the time to do much research, it look as though he decided to
make the treble 25 cents sharp of the tenor, irrespective of whether
that was a 12 or an 8 and then calculated a progressive sharpening of
the intermediate bells. For example, for an 8, rather than multiplying
the tenor progressively by the 12th root of 2 (1.0594631 ish) he would
use the 12 root of 2.0269 (which is the ratio you get if you sharpen the
treble by 25 cents (1.060739 ish))




Andrew Higson

Taylors Eayre and Smith Ltd

The Bellfoundry

Freehold Street


LE11 1AR

Telephone: 01509 212241 Fax: 01509 263305 Registered in England No.


From: bellhistorians at yahoogroups.com
[mailto:bellhistorians at yahoogroups.com] On Behalf Of Bill Hibbert
Sent: 02 December 2007 12:05
To: bellhistorians at yahoogroups.com
Subject: [Bell Historians] Stretch tuning


Mark Regan:

> The best 12s with stretched trebles for this period are Pier Head 
and Evesham. Their figures may help...

I don't have the figures for Pierhead. Evesham are interesting, the 
back ten are not stretched at all. The trebles have tentative 
sharpening (21 cents in the treble, 13 cents in the second) but not 
full stretch. Here's a list of peals and dates, the figure quoted is 
the average stretch in cents per octave:

Evesham (1951) - 0.06 cents back ten, 7.1 cents all 12
Cambridge (tuned 1952) - 25.4 cents
Tewkesbury (1962) - 25.8 cents
Melbourne (tuned 1962) - 27.1 cents.

I could go on at length about this, with more examples ...

However, I asked a different question. Does anyone know the approach 
used in Taylor's foundry / tuning shop to decide how much to stretch 
these peals? A first-hand account would be brilliant.


Bill H


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