Electrical question

[David Love]

Thanks Alan and Paul.  What I looked at was a Radio Shack Computer Cooling
fan.  I don't know the specs but I can check.  The box I have is about the
same length and width as Paul's but only 3" deep.  I'm heating it with DC
rods.  I have a window cut in the face covered with plexiglass so that I can
see the humidistat readings.  There is a dial controlled humidistat that
goes down to 10 or 15% RH (much lower than I need).  

 

The other thing I wonder about is just how long should one expect it to
take, typically, for a panel  8mm thick that's kept at shop conditions ( 65
degrees and 50 - 55% RH) to dry down to an EMC of 6 - 6.5% when exposed to a
box whose temp is, say,  80 degrees with an RH of 30%, a condition which
should produce an EMC of 6.1%.  I've read reports that suggest anywhere from
1 or 2 days to 3 months!  

 

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of paulrevenkojones at aol.com
Sent: Saturday, February 23, 2008 7:51 PM
To: pianotech at ptg.org
Subject: Re: Electrical question

 

David:

It somewhat depends on the size of the box you're building. Mine is 6' x 8'
x  15", or about 60 cubic feet. I've installed a small radial mixing fan
toward the top blowing down (heat rising); I drilled 6 holes in the top with
close-able caps to balance the heat and gauge a temperature against moisture
content. I have a Lignomatic moisture meter cable into a piece of spruce
from the panel to monitor MC/EMC. The heat source is a contained oil
radiator in the back of the box. The whole system is highly indexable. The
fans, by the way, are available cheaply in places like American Science
supply and are easily wired to a plug. I don't know the voltage or fuse
requirement of the small fans you're talking about, but I would guess that
12 volt won't run them, and there has to be a fuse in the line somewhere.
Boat engines and wall sockets are my speed. 

Paul

 

 

-----Original Message-----
From: David Love <davidlovepianos at comcast.net>
To: 'Pianotech List' <pianotech at ptg.org>
Sent: Sat, 23 Feb 2008 9:24 pm
Subject: Electrical question

So I'm making a new hot box for my soundboard panels.  I want to install a






small little fan like a computer cooling fan in the box to circulate the






air.  They come with a couple of wires (not like a plug or anything) and






information about voltage, max current, all kinds of stuff that means






nothing to me, the electrically challenged.  If I want to hook this thing






up, how do I do it?  Can I just connect it to a 12 volt battery if it's a 12






volt fan?  If I want to plug it into something do I need something like a






capacitor to pull down the current to a level that this little thing can






handle?  Any advice would be appreciated.  Thanks in advance.  













David Love






davidlovepianos at comcast.net 






www.davidlovepianos.com



























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