wire (was Pure tone)

[Newton Hunt]

I love it when we agree!  Even when we disagree we agree.

Being a simple praktikal in-gon-ear you talk over me hair (what's
left of it.)

Thanks Stephen.

		Newton

Stephen Birkett wrote:
> 
> Newton:
> > Well this goes back to Brickney's statement that the new formula
> > wire could be heard to have different inharmonicity and I saw
> > bull.  You know, I know and the sales man knows or should.
> >
> We all seem to be in agreement on this.
> 
> Found a specs chart for Roeslau wire. Taking say 25 gauge (1.5 mm) to 12
> gauge (0.75 mm) - that's a drop in diameter of exactly 12 semitones. The
> stated "resistances" (I assume they mean breaking tensions in kgf) are 360
> kg and 108 kg respectively. These translate to tensile strengths of 1998
> MPa vs 2398 MPa. Tensile pickup rate is about half or less what you get
> with historical iron wire. For Roeslau over that range it's 1.6 semtiones
> per 12 semitones change in dia, or about 0.13 s.t. per s.t.. Bit more
> than the steel wire I used as an example previously.
> 
> Stephen
> 
> Stephen Birkett Fortepianos
> Authentic Reproductions of 18th and 19th Century Pianos
> 464 Winchester Drive
> Waterloo, Ontario
> Canada N2T 1K5
> tel: 519-885-2228
> mailto: birketts@wright.aps.uoguelph.ca