In a message dated 26/08/03 1:40:25 PM, davidlovepianos@earthlink.net writes: << If sluggishness were the only problem then it could be treated, but since the problems come from changes in humidity, then treating sluggishness is only as good a fix as the humidity is constant. >> I am lost here...care to expand a little? <<What I am trying to treat is changes in friction that come with humidity swings. Addressing the action centers won't accomplish that. >> Gonna defy the laws of physics? :-) Addressing the action centers is the best way to address "changes in friction" as this is where most of the friction changes happen during humidity swings. There are other, lesser, causes of friction change but the centers are the most amenable to correction. <<" The humidity needs to be regulated in some manner. >> Or as an alternative the piano needs to be made to work across the full spectrum of humidity swings. << Convection problems could be treated by closing the lid of the piano when not in use.>> Not really. A string cover would help more. << Speculating on the potential problems is easy,>> Well I make a pretty good living by replacing pinblocks and restringing pianos where a piano tuner installed a DC to "solve sluggishness problems" and that ain't speculation. << I would guess that the low conductivity of wood would render a low wattage heater bar relatively safe if located below the level of the flanges on the action bracket. >> OK........ go for it! :-) Terry's thought about putting a DC under the keybed and placed under the action has some merit. At least the convection would happen in the correct area. Jim Bryant (FL)
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