Not likely with one pitch raise. But if you are asking whether in one sitting you could get the piano to pitch and stable enough for a concert or recording session the answer is yes. The original question didn't have to do with how many passes might be required to get the piano stable. It was to what degree the piano would continue to settle. I suppose if the piano is so far off that when you pull the piano to pitch that you change the position of the bends in the wire around the contact points and the strings, therefore, need to straighten out again, you might have some instability. But I have pulled pianos up from 65 cents or more (probably getting the old bends back into position), done a fine tuning and had the piano be very stable. It may have taken me two or even three passes to get the piano close enough to where I could fine tune it but other than that it didn't seem to matter how far off it was. The explanation might be that the reaction to the change in string tension happens mostly in the plate which reacts instantly to that change (witness what happens to the pitches of the surrounding notes when a single string breaks). Requiring additional time to stabilize suggests that the plate would continue to creep after the initial move. It just doesn't seem to do that. David Love davidlovepianos@comcast.net -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of pianolover 88 Sent: Tuesday, December 20, 2005 10:05 PM To: pianotech@ptg.org Subject: RE: Let's Get This Settled was How to explain a pitchadjustment..and! Do you think that if a concert D that had to be tuned for a major recital, recording, etc., that was, say 65C flat would be perfectly stable after a single pitch raise and one fine tuning? Terry Peterson ----Original Message Follows---- From: "David Love" <davidlovepianos@comcast.net> Reply-To: Pianotech <pianotech@ptg.org> To: "'Pianotech'" <pianotech@ptg.org> Subject: RE: Let's Get This Settled was How to explain a pitchadjustment..and! Date: Tue, 20 Dec 2005 20:56:41 -0800 My experience says it doesn't matter. Once you correct the pitch and do a fine tuning, all other things remaining constant, the piano will stay in tune. The piano doesn't really settle. Moving the piano cross country may challenge the piano in terms of EMC but nothing more. An upright can go out of tune with a move across the room because the four point weight bearing can tweak the stresses in the case a bit if the floor is not exactly level. The three point weight bearing of a grand makes it immune to such problems. David Love davidlovepianos@comcast.net -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Alan Barnard Sent: Tuesday, December 20, 2005 8:25 PM To: Pianotech Subject: Let's Get This Settled was How to explain a pitch adjustment..and! Terry's post begs the question (and please understand I ain't challingin' nobody on nuttin' ... I'm just seeking information and opinions and science, here) ... Do a piano really need time to "settle" after .. 1. Big pitch change? 2. Small pitch change? 3. Moving it across country? (other than environmental acclimation) 4 Moving it across the room? I have been under the impression--and it may be altogether wacky--that every change that is going to occur in the piano occurs immediatly upon cranking the pin. I thought someone (Dr. Sanderson, perhaps) tested this and proved it. So an adjunct question: Let's say we find a piano 15 cents flat. We pitch correct and fine tune and walk out the door with a follow-up appointment set for three months. When that day arrives, for those who have set such appointments, is the piano any flatter or more sour than it would have been if we found it A440 but still came back in three months? Same question, only now the piano was originally 35 cents flat. 60 cents? 120 cents? Certainly I've restrung pianos and found them pretty sick in a couple of months but have always attributed that to new wire stretch, not tension settling. Helmet on, raincoat on, rubber duckie in hand, I await your missives, if not missiles ... Alan Barnard Salem, Missouri > [Original Message] > From: pianolover 88 <pianolover88@hotmail.com> > To: <pianotech@ptg.org> > Date: 12/20/2005 6:24:24 PM > Subject: Re: How to explain a pitch adjustment..and! > > Depending on the amount of PR, ususally more than 12C, I always schedule a > "follow-up" tuning in 1-3 months, explaining that after restoring all that > loststring tension, the piano now must "settle" and adjust to that added > tension, and it some shifting of will occur. So the follow-up is crucial in > building long term stabilty. And that tuning will leave the piano much more > stable because tuning pin movement will be much smaller than during the > initial PR and tuning. Again, never a problem. Yes, it does help to have a > high confidence level and be able to effectively communicate and impart > information to your client in a clearand concice manner. I am a salesman as > well as a technician; that has made the difference between just getting by > to making a six figures. > > Terry Peterson _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives
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