Hi Terry, Then why talk about moving the pins at all--if it confused me--it would confuse a client. By the way I think the pins flagpole in the block under tension and do contribute in that fashion to instability. As far as DC systems go I'm waiting longer and longer--3 months to six months if I can--and find that some changes are still happening after a year. At 08:14 PM 12/20/2005 -0800, you wrote: ><<Are you suggesting that tuning pin movement is the source of pitch >instability after pitch correction?>> > >Nope. It's the change in TENSION precipitated by the excessive pin movements >(during the PR) that cause instability. When large amounts of tension are >added,(which can and often is THOUSANDS of pounds!) the piano must >distribute this tension; it does not do so immediately, as we know. >Similarly, after installing a DC I will always let the piano aclimate for at >least two weeks before tuning, as the pitch will almost always drop, >sometimes substantially). IF the client is going to play the piano only >occasioanlly, I will then schedule the next tuning in 6 months . > >Terry Peterson Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. Non calor sed umor est qui nobis incommodat mailto:pianotuna@yahoo.com http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK, S4S 5G7 306-539-0716 or 1-888-29t-uner
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