Overpulls was Re: Best Tuning Strategy using SAT III

[Farrell]

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FWIW, I pitch raise pianos that are up to 100 cents flat in one pass on =
a regular basis. That is, of course, followed by a "fine" tuning pass. =
Only on rare occasions do I have a string break on a large pitch raise.

Alan: If I understand you correctly, you tune the piano to A440 by ear =
and then use an ETD and do a pitch raise? Why not just use the ETD in =
the first place? Isn't that what it's for? Maybe I don't understand.

I experimented with a 100-year old Everett grand in my shop one time to =
see how far above pitch you could go before strings popped. Quite =
clearly these were original strings. Typically you could go 200 to 400 =
cents sharp before they broke.

Terry Farrell
  ----- Original Message -----=20

  I also can't imagine bringing a piano from -100 to +25 but you don't =
have to. But if each string can't stand being up to pitch, they're going =
to be a problem, anyway. So ...=20

  For a piano that much off, I'd set a very quick temperament to 440, =
tune up and down quickly, then use the ETD for an over (or under) pulled =
tuning from A0 to C88.=20

  Condition of the strings, especially at the pins, the hitch loops, and =
the V bar/agraffs might have some bearing on my choice of procedure, but =
I have only rarely broken strings, even on big raises. And in those =
cases, aside from pianos so rusty they might have been brought up from =
the Titanic, it is usually a case of the elasticity being gone from the =
strings. If you lube the bearing points, etc., but then feel the string =
stiffen and stop yielding as you pull it up, you can suspect that the =
strings are genuinely shot and that next noodge is going to result in a =
resounding "twaaang." If restringing isn't in the cards, I have left a =
couple such pianos at 20 cents flat and tuned very gingerly.

  Alan Barnard
  Salem, Missouri

    ----- Original Message -----=20

    I'm still the dinosaur, I guess.   I don't use any over pull during =
pitch raises...and a string will still break on occasion.   I can't =
imagine bringing a piano from -100 cents to +25 cents without serious =
string breaking...
    David I.

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