Hi Tom, My understanding from David Sanderson's class is that the 'bump' is the result of the winding being wound over itself; the result is that the mass is increased slightly. The idea is that the extra mass mimics a bass string that would be wound all the way to the end of the speaking length. Respectfully, Jon >List > >Today I tuned a new Baldwin console with the tenor wound strings having a >triangular core which extended about an inch into the windings. From that >point on the core was round. This was true on the two wound strings on the >treble break side and about the first 4 or 5 on the bass side, and then the >rest were normal. (Round) Some new innovation? It seemingly made those >unisons more difficult to tune. If that was their intention, I label it a >success. > >This reminded me of something I had been meaning to ask about. I have >noticed on some spinet pianos that this same tenor and high bass area has >wound strings that are kind of "bumpy" for the last inch or so before the >winding stops. I can't find the words to quite describe this, but I'm sure >some of you have seen this because I've seen it on numerous pianos. It looks >as if it were kind of braided, or something. It's not the swedge of the >steel core. They're not double-wound strings. It's just uneven and the >uneveness seems to spiral around the string. It seems to be there by design, >because there will be several of them in a row, all looking the same, >but....just different than the strings on every other piano. > >Any ideas on what this is all about? Or do I need new glasses? > >Tom Sivak > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives -- Jon Ralinovsky Piano Technician Department of Music Miami University 513/529-6548
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