Has 'Thump" changed his name. LOL John M. Ross Windsor, Nova Scotia, Canada jrpiano@win.eastlink.ca ----- Original Message ----- From: "Alan" <tune4u@earthlink.net> To: "'Pianotech'" <pianotech@ptg.org> Sent: Sunday, March 06, 2005 3:45 PM Subject: RE: Tuning a concert piano with humidity control > 1. The undercover material, I am 99% sure, is speaker cloth. I don't > think > anyone would notice a difference in tone or volume. > > 2. You can put an undercover on a piano with low-slung tank by putting a > couple of the Velcro stips on the tank sides and adjusting for that extra > dimension with you cut the cloth. Alternatively, I've considered having a > tank-shaped cutout in the cloth and let the tank hang through. That might > be > the neatest and easiest way to do it--maybe with flaps of the material > hanging down loosely, on each side, to cover the area between the top of > the > tank and the rest of the undercover. Wouldn't that work? Sure seems like > it > would. > > Other than the light-heat issues that will affect any piano regardless of > the humidity control system, keeping the underside of the piano, at least, > stabilized as to humidity will surely help. > > It's kind of scary to think of it this way, but if 200 people come to a > concert there will be 200+ 98.6 degree heat-radiating high-output > humidifiers going full blast in that room--beginning maybe a half-hour > before the show. And let's not even talk about the obnoxious and toxic > fumes > eminating from those same humidifing systems: hydrogen sulfide, carbon > dioxide, salami and onions, etc! > > Alan R. Barnard > Still Smilin' in Salem, MO > > > -----Original Message----- > From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On > Behalf > Of Jerry Cohen > Sent: Sunday, March 06, 2005 10:18 AM > To: 'Pianotech' > Subject: RE: Tuning a concert piano with humidity control > > > Thanks for the reply, Don. > > The piano will be a Bosie 225 (7' 4"). The piano has not been delivered > yet, > so I am trying to think ahead. > > This piano requires a dual tank system, and because of the complex beam > structure, the tanks must be mounted below the beams. Actually, one of the > tanks would just fit, but the other just misses. Therefore a bottom cover > is > not an option. That is why I am requesting a custom floor length cover. > > With no bottom cover, does it make sense to keep it plugged in during the > concert? They do mostly chamber music, so the piano gets repositioned > depending on the number of instrumentalists for each work. > > With all this in mind, what is the best timing sequence for removing the > cover and tuning? > > Thanks, > > Jerry Cohen, RPT > NJ Chapter > > -----Original Message----- > From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On > Behalf > Of Don > Sent: Sunday, March 06, 2005 8:58 AM > To: Pianotech > 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 > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives > > _______________________________________________ > 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: 03/04/2005 > > > -- > No virus found in this outgoing message. > Checked by AVG Anti-Virus. > Version: 7.0.308 / Virus Database: 266.6.2 - Release Date: 03/04/2005 > > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives >
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