Hi Barbara, DC systems without bottom covers always struggle. If the lid is fully closed then the string cover may be redundant as far as humidity control goes. When a piano is used for performance then some performers may prefer it to be removed totally from the instrument. Bottom covers work--and so do string covers. String covers may be a fairly pricy item compared to bottom covers. If I were doing a 7 or 9 foot and price were no object I'd have a dual tank DC system with bottom cover, string cover and a floor length padded cover. If price is more important than performance I'd first eliminate the 2nd tank, and then the string cover and finally the padded cover. I will not install a grand DC system without a bottom cover. At 04:37 PM 4/27/2007 -0500, you wrote: >Hey Don, > >Hmm, I don't get it. The string cover only works when the lid is not fully >closed? Wouldn't it be working all the time, too? (Unless if you removed >it, that is.) Except in the case of "breezy" conditions where I understand >the DC system would struggle, I would think that the string cover might have >an advantage because it covers the air access to the action cavity, too. I >could be mistaken, though. For my own personal curiosity, I'd like someone >to do a side by side study. :-) > >Maybe I'll check with a couple of my customers who had undercovers installed >a while after the DC system and see what the difference in filling the tank >turned out to be. But surely someone has figures on that (probably DC). > >Barbara Richmond, Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. Non calor sed umor est qui nobis incommodat mailto:pianotuna at 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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