[Elecraft] Equipment Storage and operation

[ktalbott at gamewood.net]

We engineered electronics packages for these types of environment, from
desert to arctic.  Keys for success:
1- Inside of housing must be designed to route any condensation away from
the electronics.  Design ENCOURAGES condensation on normally cooler
enclosure surfaces, not the electronics.
2- A compartment heater (actually a high wattage, low value resistor) is
ALWAYS energized to keep interior air temperature and temperature of
electronic assemblies slightly above exterior.
3- Compartment must be absolutely air tight so as not to allow breathing as
atmospheric pressure changes.
Condensation that occurs collects on housing and drains to bottom of
enclosure.  If cooling is required, it must be done with heat exchanger to
avoid ingress of outside air.
BTW, mission critical equipment was housed in nitrogen purged compartments,
including conduit which is major source of humid air flow!  We required that
equipment stored during construction must have compartment heaters
energized.
So, it can be done.
Ken ke4rg

-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
Behalf Of Dave Sublette
Sent: Thursday, July 5, 2018 8:38 AM
To: Elecraft Discussion List <elecraft at mailman.qth.net>
Subject: [Elecraft] Equipment Storage and operation

I should start with an apology to the group.  Although I stand by what I
said in a previous post, I feel that the way I expressed myself was in
violation of decorum standards for this group.  I am sorry for that.

<snip>