Hello Don and List Surely adding a bottom to a grand when used for recitals/concert work would alter the tonal characterisitics. A lot of the sound comes from under the piano. Please comment. Regards from after a day in Brighton where my son Maxim came second in violin competition (he's 7yrs.) BTW the piano I accompanied him on was out of tune, had one key-top (plastic) missing and was a small living room upright. Yuk! Michael G.(UK) ----- Original Message ----- From: "Don" <pianotuna@yahoo.com> To: "Pianotech" <pianotech@ptg.org> Sent: Sunday, March 06, 2005 8:58 AM Subject: Re: Tuning a concert piano with humidity control > Hi, > > I would arrange for it to stay plugged in during the concert, or else add > an uninteruptible power supply (like the ones for computers) to it. > > I'd add a bottom cover to the piano immediately. I recently measured a > 5'10" (175 cm) grand. Room was 16% and humidity at the controller above > the > beams was 18%. This was in a classroom so there was no lighting to deal > with. As a bonus, the instrument will also look esthetically more pleasing > with a bottom cover. > > In an ideal world the piano would be under performance conditions (full > stage lights etc) for 8 hours before the tuning began. > > At 10:32 PM 3/5/2005 -0500, you wrote: >> >> >>If a Dampp-chaser system is installed in a piano that is only used for >>concerts, what is the best schedule to observe for unplugging the >>Dampp-Chaser, moving the piano on stage, and tuning? >> >>Here is the problem I see. The Dampp-Chaser will maintain the piano at a >>fairly constant humidity, especially with a floor length cover over the >>piano. But when the piano goes on stage, the lid is raised, and the lights >>are on, the humidity as well as the temperature will change. I understand >>that the effect of temperature change, especially from the lights striking >>the strings is almost immediate, while the plate takes longer to warm up. >>The effect from the humidity change is much slower since wood takes longer >>to change its moisture content. >> >>As a practical matter, how soon before the concert should the Dampp-Chaser >>be disconnected, and the piano moved on stage? And when should it be >>tuned? >> >>Looking forward to your responses. >> >>Jerry Cohen, RPT >>NJ Chapter >> >>_______________________________________________ >>pianotech list info: https://www.moypiano.com/resources/#archives >> >> >>-- >>No virus found in this incoming message. >>Checked by AVG Anti-Virus. >>Version: 7.0.308 / Virus Database: 266.6.2 - Release Date: 3/4/2005 >> >> > 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 > 306-352-3620 or 1-888-29t-uner > >
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