Hey Ed, Choosing between changing the angle of the pressure bar, and increasing the pin torque, I would bet on knocking the pins 'just a wee bit' deeper into the block...Control should increase...You don't need to bottom out the pins...Just punch them in 1/16th" Dan Reed pianoarts at tx.rr.com On May 19, 2009, at 5:59 PM, Ed Sutton wrote: > Yesterday I tuned two grey market U-1s which a school bought for use > in small teaching studios. > > I noted a difficulty I sometimes have getting a stable unison with > notes in the U-1 treble, particularly octave 5. > > The tuning pins were holding, but not with a lot to spare, and the > pressure bar was not very low. The result was that the strings > render very easily, and don't offer much friction to help stabilize > the pitch. Add to this the low torque pins, and some of the notes > tend to jump back and forth on the slightest touch of the tuning > pin, 4 beats sharp, 5 beats flat, 2 beats sharp, 4 beats flat, and > so on. (This is the opposite of the tuning problems in a typical > 1990's Steinway vertical.) > > I am curious if anyone has tried tightening the pressure bar in a > U-1 with this condition, and if it has made tuning less tedious in > the treble. > > Ed Sutton -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20090519/b07fb6e9/attachment.htm>
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