Begs a question: Is this phenomenon more prominent in pianos with a long backscale, say a big grand or clonkingly huge old upright, or with pianos with the bridge very close to the hitch pins, say a yiddo-biddy spinet? For that matter, what about pianos with a lot of string between tuning pin and agraffe/vee compared to uprights with the pins nearly on top of the pressure bar? There may not be much data out there, because most neglected pianos are not big grands, in my experience, but we might think of comparisons between small consoles and big uprights. Then again, how do you even out other variables in the quality of the piano design (bridge design & condition, soundboard crown stability, downbearing, wire angles around agraffes vee bars, pressure bars, framing strength, plate design, etc? Alan R. Barnard Salem, MO -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Don Sent: Tuesday, July 01, 2003 3:28 PM To: pianotech@ptg.org Subject: 12 cents Hi Joe, With respect, your experience in pitch correction is not the same as mine at all. A piano that is moved 12 cents will not be stable. The most recent example of this was a large old german upgright I tuned in England. I did a 27 cent pitch correction at A4. The tenor was somewhat flater and the last octave in the treble was 40 cents sharp. The piano was within 1 cent after the pitch correction, unisons were lovely and the octaves were very nice. The piano is equipped with humidity control. 24 hours later the pitch at A4 was 2 cents sharp and the tenor about 7 cents sharp. The mid treble was fairly stable but the top octave was again sharp--by about 30 cents. The bass on this instrument was slightly flat. There were also many unisons that had drifted. ===== Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. 3004 Grant Rd, Regina, SK, S4S 5G7 Tuner for the Saskatchewan Centre of the Arts http://us.geocities.com/drpt1948/ __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.489 / Virus Database: 288 - Release Date: 6/10/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.489 / Virus Database: 288 - Release Date: 6/10/2003
This PTG archive page provided courtesy of Moy Piano Service, LLC