weirdly wound strings

[Jon Ralinovsky]

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
>
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-- 
Jon Ralinovsky
Piano Technician
Department of Music
Miami University
513/529-6548