Square Grand Scaling Question

[Stéphane Collin]

Hello Richard.

Here is a table of diameters for iron strings in use at the end of the 18th century (referred to as Thomée's Nuremberg gauge system by Michael Latcham).

9/0   1.10 mm
8/0   1.06
7/0   0.97
6/0   0.87
5/0   0.83
4/0   0.76
3/0   0.66
2/0   0.60
1/0   0.56
1      0.51
2      0.46
3      0.41
4      0.37
5      0.32
6      0.28

But you must keep in mind that this was not absolute : on six pianos by Hofmann, at different times, the gauge number 7/0 for example was 1.02 mm in 1784, 1.15 in 1785,  1.05 in 1790, 1.02 in 1795, 0.99 in 1800.

Also, in those times, a bulk of so called 7/0 wire was not constant of diameter, nor perfectly cylindric.

Better rule for stringing such old instruments, methinks, is to play the game like they did : try which diameter sounds best at that place, without breaking too soon.

Regards

Stéphane Collin




----- Original Message ----- 
From: "Richard Brekne" <Richard.Brekne@grieg.uib.no>
To: "Newtonburg" <pianotech@ptg.org>
Sent: Tuesday, November 18, 2003 4:11 PM
Subject: Square Grand Scaling Question


| 
| Hi folks
| 
| 
| On this square I am doing there are what appear to be some kind of
| string size numbers, but I havnt run into these before so I thought I'd
| ask.
| 
| The highest notes end with 2. an octave or so down comes 1. then we go
| over to 1/0, 2/0, 3/0, 4/0 and 5/0. There are a few 1/2 marks  inbetween
| all whole sizes. 
| 
| Does anyone know the wire size these translate into ?
| 
| Cheers
| 
| RicB
| 
| -- 
| Richard Brekne
| RPT, N.P.T.F.
| UiB, Bergen, Norway
| mailto:rbrekne@broadpark.no
| http://home.broadpark.no/~rbrekne/ricmain.html
| http://www.hf.uib.no/grieg/personer/cv_RB.html
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