Pitch change is most likely string segments equalizing tension. Most techs believe in a FAST pitch raise that will typically not include any significant effort to stabilize the string at the new tension. I know I am in the minority (all alone?) in usually taking 25 to 40 minutes to do a pitch raise (up to about 75 cents) with my SAT. I find that because the SAT can help me come SOOOOOO close to the final pitch (usually within 2 cents on a 25 cent pitch raise) it seems worth the little extra time to be reasonably accurate with the hammer, and work the string a bit to equalize tension and settle it down. I won't bother asking for comments on this approach! :-) (It may just be an excuse for being a bit slow!) Terry Farrell Piano Tuning & Service Tampa, Florida mfarrel2@tampabay.rr.com ----- Original Message ----- From: <drose@dlcwest.com> To: <pianotech@ptg.org> Sent: Wednesday, July 19, 2000 1:37 AM Subject: pitch raise and stability > Hi all, > > I am still on the road but ended up tuning a piano for a friend. I decided to do a single pass pitch correction on a 40" aeolian product from the sixties. > > The pitch at A4 immediately after the pitch correction (one single pass using Reyburn Cyber Tuner) Pitch correction at A4 was 47 cents. > > Immediately after the tuning I measured pitch and wrote it down. Six hours later I checked the pitch again, and pitch had *risen* over 2 cents at A4. > > Comments? >
This PTG archive page provided courtesy of Moy Piano Service, LLC