Terry: Check to see if the piano has a laminated sound board. In my experience a piano with a laminated board needs significantly less over pull. I assume that this is because the board itself is stiffer due to the cross grain and layers of glue, and doesn't flex as much as a solid board. I also use a SAT, but in these cases I modify my pitch raise technique. In the middle section, rather than tuning the unisons as I go, I mute off the strings, pull just the center strings up to pitch up throughout the tenor section, and then go back and pull in the unisons. The upper treble and bass I tune as usually. This usually brings the pitch raise in as close as I typically get normally. I also use this procedure on spinets and it works well on them too. I hope this helps. Patrick Poulson, RPT ----- Original Message ----- From: "Farrell" <mfarrel2@tampabay.rr.com> To: <pianotech@ptg.org> Sent: Thursday, February 07, 2002 8:50 PM Subject: Wierd Pitch Raise Results > Half the piano I tune require a significant pitch raise. I do a lot of pitch raises. I use a SAT III. Almost all my pitch raises come out really close to target. > > BUT. Some don't. Today I pitch raised three pianos. An Aeolian spinet (what junk!) was raised 30 cents - came out real close to target. A German F. Weber old upright - raised 80 cents and came out right on target. Yesterday I did 60-cent pitch raises on six P22s (and tuned them - new tuning output record for me! - also a new one-day income record for me! :-) !!) - all came out right where I wanted them. > > I also pitch raised a 1973 Kimball console today. The piano was all over the place tuning-wise, but was only about 5 to 10 cents flat on average. I made the small pitch offset correction as usual with the SAT, and after the pitch raise pass, the ugly son-&%-$-$#%&@ was a good 15 to 20 cents sharp. WHY? I went through it again without any pitch correction (the piano should have ended up perhaps 5 cents sharp) and every thing was like at least 10 cents sharp! > > Is this like some loosey goosey piano or what? Was I having an acid flashback? I takes a lot to get me riled up while working on a piano, but this one pushed me close to the limit. > > Ever see anything like this, or is it more likely that I was just tired and screwing up big time? > > Thanks. > > Terry Farrell > > >
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