DC Query/a possible solution

[Farrell]

Hey, if you are going the linen route, why not consider some type of speaker
cloth (it's available in just about every color and mesh type). That way you
could be relatively sure of a minimum of sound loss (careful though, 'cause
even some "speaker cloth" impedes sound more than others).

Terry Farrell
Piano Tuning & Service
Tampa, Florida
mfarrel2@tampabay.rr.com

----- Original Message -----
From: "Richard Brekne" <richardb@c2i.net>
To: <pianotech@ptg.org>
Sent: Monday, March 06, 2000 4:16 PM
Subject: Re: DC Query/a possible solution


> Hi Bob... thanks for the reply, and thanks to the others who supplied such
> interesting info. I was wondering just how you configure the mylar
underneath the
> grand since you say it does not cover the entire underside. Just where do
you
> allow for openings. And, since there must be openings as you say, could
not these
> be such that the mylar (or what ever is used, can be left open at the spot
where
> the dehumdifier is so that it can be serviced without removal of the
enclosing
> material ? How about the humidistat and the dehumidifyer.
>
> I was thinking about trying a thin textile instead of plastic,  secured by
velcro
> for easy removal and re-placement. I am handy with a sewing machine so it
wouldnt
> be a big problem to make such a thing. My thinking was that a relatively
thin
> layer of of linen or the like would be just enough enclosure to stabilize
the
> system, while being able to let the sound breath though easily enough.
Comments
> ??
>
> RptBob1@AOL.COM wrote:
>
> > In a message dated 3/6/00 12:53:38 AM Eastern Standard Time,
> > KENNETH.GERLER@prodigy.net writes:
> >
> > << particular
> >  > level tho as the hygrometers just show the present, high, and low
levels
> >  > each time I check them.
> >  >
> >  > The guy who runs the import of these in Norway suggests that I cover
the
> >  > bottom of the grand with a thin plastic film, enclosing thus the
whole
> >  > system and underside of the gr >>
> > Richard:
> >
> > I have installed sheets of mylar (available from Damppchaser) under
several
> > Grands to ward off heavy air movement towards a cold-air return next to
these
> > pianos.  The installation does not cover 100% of the bottom of the Grand
> > since there has to be room around the De-humidifier for it to work
properly.
> > This is, therefore, not an "airtight" installation and the piano area
under
> > the soundboard does not suffer from excessive moisture buildup.  I have
> > noticed no adverse effects from this installation technique and it
> > immediately brought me the results I was shooting for: the system was
now
> > working very well without interference from air blowing across the piano
> > bottom. Incidentally, I used large headed tacks (like the ones furnished
by
> > DC for new installations).  There is the inconvenience of having to
remove
> > the mylar each time you clean the Humidifier tank.
> >
> > Bob Bergantino,RPT
> > Willoughby Hills, Ohio
>
> --
> Richard Brekne
> Associate PTG, N.P.T.F.
> Bergen, Norway
>
>
>