[time-nuts] Temp/Humidity control systems
Mike Naruta AA8K
aa8k at comcast.net
Wed Oct 26 14:43:36 EDT 2016
On 10/26/2016 11:59 AM, John Ackermann N8UR wrote:
> I may have the opportunity to build a small "clock room" and am
> considering whether I could make it an environmentally
> controlled space. I'd like to learn about the options for doing
> The space would probably be 6x8 feet or so, in a basement with
> one outside wall.
> Can anyone point me to purveyors of the hardware to do something
> like this? Because I'll have a limited time to build this, I'm
> looking for something that uses more-or-less off the shelf gear,
> and not a whole lot of custom engineering.
I built a "ham shack" room in my unheated barn. 8 by 12 feet,
interior lined with sheets of foil-backed foam insulation board,
then plywood over the insulation. Walls, ceiling, and floor. A
600 watt portable heater is more than enough to keep it
comfortable in the Michigan winter (-26F -32C in 2015) This is
with no equipment turned on. You problem will likely be getting
rid of heat. A small, through-wall air conditioner might be a
cheap way of doing it. Place the chiller outside the house.
The trick is to reduce the hunt differential. Might be easy to
build your own thermostat circuit to control the compressor.
Another option might be a small window air conditioner dumping
into the basement. That way you don't have to plumb the
I don't know how humid it gets in Snellville, but the air
conditioner should take out the humidity.
At the end opposite the door, I have a bathroom-type exhaust fan
in the ceiling if it gets too unpleasant inside. I have a
tunnel over the fan with acoustic foam inside to reduce fan noise.
When I installed the sheets of foil-backed insulation, I put
expanded aluminum mesh over the gaps. It's a fairly-effective
Faraday cage too. Sealing the door was a bit tricky, but when I
close it, signals decrease. Useful when you have three
broadcast transmitters in the neighborhood.
Mike - AA8K
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