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
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