[pianotech] hot box dimensions

[David Love]

When I built mine I left it uninsulated and leaky at first.  The only
problem was that I couldn't get the inside temperature quite high enough to
easily achieve the EMC that I wanted with the DC rods and mini fan that I
was using (San Francisco tends to be cool).  So I found that insulated and
leaky was ok but not insulated and sealed.  You need some air exchange, it
seems, to allow the moisture to escape.  But with the insulation I able to
easily get the box to 80 degrees, 30% RH which hit my 6% EMC right on
target.  For insulation I just tacked up a moving blanket in the back of the
box and rigged up a way to loosely hang one covering the doors, easily
removable to get them opened up--very high tech.  I suppose had I used a
more high powered heater that might not have been necessary. 

David Love
www.davidlovepianos.com


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of jiimialeggio
Sent: Saturday, December 12, 2009 4:45 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] hot box dimensions

Ron Nossaman wrote:
>
> Don't seal or line anything.
I was going to insulate to keep running costs down. However, insulation 
is useless without sealing. So are you saying that insulation as well is 
not useful?

>   As I recall, you already have a working practical MC gage.
Yup; quite swell it is too.

Jim I