Whole room humidity control better than Dampp Chaser. ( Right?)

[Andrew and Rebeca Anderson]

Dean,
I should have qualified further.  I was not thinking of stabilizing 
the tuning (which it does even better with top and bottom covers) but 
of stabilizing the action.  The addition of a stringcover extends the 
conditioned environment into the action cavity.  Admittedly it is not 
as well conditioned as the underside of the board but the difference 
in regulation stability experienced after adding a stringcover is 
like that of night and day.   I suppose it might be less noticeable 
on a new Kawai with the Millennium action...

Andrew Anderson

At 04:16 PM 2/20/2008, you wrote:
> >>A DC system really can't be effective in a grand without a string-cover.
>
>I have years of anecdotal evidence on scores of installations that 
>say otherwise. Perhaps a string cover increases their effectiveness, 
>but on many of my installations I don't know how. I'm talking about 
>pianos that had +/- 25 cent seasonal variation that went to +/- 2.
>
>Dean
>
>Dean May             cell 812.239.3359
>
>PianoRebuilders.com   812.235.5272
>
>Terre Haute IN  47802
>
>
>----------
>From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] 
>On Behalf Of Andrew and Rebeca Anderson
>Sent: Sunday, February 17, 2008 6:43 PM
>To: Pianotech List
>Subject: Re: Whole room humidity control better than Dampp Chaser. ( Right?)
>
>A DC system really can't be effective in a grand without a 
>string-cover.  Even then it doesn't really help the front 
>key-pins.  An undercover is recommended if the place has forced air 
>heating/conditioning.
>
>My wife's concert grand wouldn't stabilize until I made both additions above.
>
>Andew Anderson
>
>

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