Just to clarify, the piano is in a completely normal environment in a high-end condo in Brentwood. I'm sure the piano was tuned before it went to the customer because the dealer is quite conscientious about that. I've been doing work for them for years. And, after having tuned, prepped and serviced dozens of new Japanese, Korean and Chinese pianos I haven't seen another piano behave this way even when taken straight out of the shipping crate and sent to the home. Even if they arrive badly off pitch they are pretty well stabilized in my experience after the initial pre and post delivery tunings. They don't keep slipping. DT > From: "pmc033 at earthlink.net" <pmc033 at earthlink.net> > Date: June 14, 2009 2:53:11 PM PDT > To: pianotech at ptg.org > Subject: Re: [pianotech] New Asian piano that will not hold a tuning > Reply-To: pmc033 at earthlink.net, pianotech at ptg.org > > > Hi, David: > You didn't mention what the environment of the piano is. Is this an > institution, or a home? Heating duct under the piano? Damage? > Direct > sunlight? Somebody secretly using it for tuning practice? Here in > San > Diego, basically the same climate as LA, most folks tune once a > year. Even > in a year, such changes would be unusual. > As far as structural changes, I'd look and see how the plate flange > and > block are fitted. Is there a large gap in there that indicates that > the > pinblock isn't tight against the flange? > 80-90 cents flat in the treble is an awful lot in six months, as > well as > the other percentages you mentioned. I would expect some slippage, > but > this is a lot overall. I've tuned Samicks, which we used to sell in > the > 80's and 90's, that didn't have this much trouble. Three pitch > raises in > less than a year ! > Puzzling.. > > Paul McCloud > San Diego > > >> [Original Message] >> From: David Trasoff <david at davidtrasoff.com> >> To: <pianotech at ptg.org> >> Date: 06/14/2009 2:31:52 PM >> Subject: [pianotech] New Asian piano that will not hold a tuning >> >> I am wondering what ideas or experience people have concerning the >> possible reasons a new Korean-made piano seems to be incapable of >> holding pitch. It's a 5'3" Samick-made grand. It was tuned prior to >> delivery in early September 08 (I assume it was; I didn't do it). >> When >> I gave it its post-delivery service in September it had slipped >> 30-40¢. I pitch-raised and tuned it. >> >> By December the customer was complaining; I made another service call >> and found the piano again 30-40¢ flat. I again double tuned it (using >> the RCT pitch raise function) and left it on pitch. I tuned the piano >> again in the beginning of June and found the bass about 25¢ flat, the >> midrange from 10-15¢ flat to on pitch, and the high treble 80¢ or >> more >> flat! It seems pretty obvious that something is moving around in >> there, a bad glue joint in the frame? an improperly secured plate? >> >> I don't have the luxury of going back and making measurements or >> poking around (I'm not being paid to do that), but I'm interested in >> what other technicians think may be going on with this piano. I've >> recommended to the store that sold the piano that it be replaced, but >> I'd like to have some possible technical points regarding the >> apparent >> failure in the structure of this piano to discuss. >> >> Thanks, >> David Trasoff >> >> --- >> David Trasoff >> Professional Piano Service >> 4130 Verdugo View Drive >> Los Angeles, CA 90065 >> Tel: 323-255-7783 >> Fax: 323-313-1519 >> david at professionalpianoservice.com >> >> >> >> >> > > > From: Paul T Williams <pwilliams4 at unlnotes.unl.edu> > Date: June 14, 2009 3:17:23 PM PDT > To: pianotech at ptg.org > Subject: Re: [pianotech] New Asian piano that will not hold a tuning > Reply-To: pianotech at ptg.org > > > > It sounds to me like a piano that wasn't tuned very many times > before leaving the factory, nor tuned well in the store. New > strings go out of tune quite quickly when new. > > > > David Trasoff <david at davidtrasoff.com> > Sent by: pianotech-bounces at ptg.org > 06/14/2009 04:32 PM > Please respond to > pianotech at ptg.org > > To > pianotech at ptg.org > cc > Subject > [pianotech] New Asian piano that will not hold a tuning > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090614/d2ff5139/attachment.htm>
This PTG archive page provided courtesy of Moy Piano Service, LLC