---------------------- multipart/alternative attachment Newton Hunt wrote: > Inharmonicity is a function of the stiffness of the wire which is a > function of length and tension. A change in wire formulation will > not have an appreciable effect on Inh. It may be measurable but no > one could hear the difference. Hmm... he said it was quite an appreciable notice. For what it is worth, tho I am not clear on how these things fit together (if at all) yet.. He gives the following. E-modulus close to190 kN/mm2, and an Average density figure of 7.90 > > > Tone duration is a function of the spring quality of the string. > Lowering the tensile strength of the wire can effect sustain. > Since many pianos have breaking percentage in the 60 to 70% range > in the treble any appreciable lowering of strength will increase > breakage likelihood. > He says his stuff is just about 8% lower in tensile strength then modern wire. He states that it will hold up to just about any modern scale. I got a whole chart of figures for each gauge which gives Yield points and Breaking points numbers. Obviously (grin I think anyways) Using this wire for designing a new scale on a piano would require a different scaleing program (because of the wire characteristics) Any idea where to get ahold of something like this ? or how to construct a crude one myself ?? > > We would not use antique style wire to string a modern piano. The > reverse is done, out of ignorance of wire quality, but the tone > does change in this instance because the tensile strength is > substantially lower. I understand this much at least...grin. > > > Small changes are not likely to be notable until getting into a > truly compromised area. > > IMNSHO > > Newton -- Richard Brekne Associate PTG, N.P.T.F. Bergen, Norway ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/6b/26/9d/46/attachment.htm ---------------------- multipart/alternative attachment--
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