Yes, but the weight of water eventually pushes it through - it's cheap but
not perfect. If you use a 20mm fitting as I did back then, water accumulates
inside until a large droplet forms then exits. The Gortex is better but more
$ £.
David, G3UNA
----- Original Message -----
From: "Lewis Phelps" <[email protected]>
To: <[email protected]>
Sent: Wednesday, January 20, 2016 8:03 PM
Subject: Re: [Elecraft] Remoting KAT500 to base of antenna
But might not this re-introduce the surface tension problem?
Lew N6LEW
On Jan 20, 2016, at 10:18 AM, David Cutter <[email protected]> wrote:
From my work in the food industry (if memory serves), critter invasion is
prevented with 0.64mm square nylon netting. This is common in the
dress-making industry. (I think it can also be found as a stainless
steel gauze). This can be glued over a breather (drip) hole in the base.
David
G3UNA
----- Original Message ----- From: "Edward R Cole" <[email protected]
<mailto:[email protected]>>
To: <[email protected] <mailto:[email protected]>>
Sent: Wednesday, January 20, 2016 8:29 AM
Subject: Re: [Elecraft] Remoting KAT500 to base of antenna
Fred,
Your high desert climate will probably produce less condensation than my
sub-arctic/maritime environ. What I do for enclosures is to not seal
them airtight but provide good drain openings which air can exchange.
Of course the shelter is made to repel direct rain/snow.
I suspected that my TR relays were "freezing up" at lower temps making
the action delayed so I used some big aluminum Dale resistor strapped
onto the relays to add direct heat by conduction. I happen to have 28v
equipment so used 28v thru the resistors to produce heat within their
wattage rating (used 40w resistors at both relays). Of course this also
provided some heating of the ambient air of the enclosure which helped
keep moisture from forming even in 90% humidity of the fall. It rains
8-days with one day off from August to October when temps finally drop
below freezing and rain becomes snow. You don't have anything near
that.
One thing I have noticed about drain holes in some equipment is they are
too small to allow water to drop free due to surface tension and in my
environ that results in the weep holes freezing tight. I drill them out
to 1/4 inch. Of course if you are prone to insect/archnid invasion that
is problematic.
PS: I lived five years in the high Mojave Desert so know all about
"critters of the desert" (never stick your hand into a confined space
before kicking it to see what crawls out or "rattles"!
73, Ed - KL7UW
------------------------------------------
3. Reno/Sparks is a high desert [4,500'] directly adjacent to the
Carson Range and Sierra Nevada [really big mountains]. Winter temps go
down into single digits, it does snow/rain. Should I do anything to
prevent condensation in the weatherproof box [light bulb, drain hole,
???].
73,
Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org
73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
[email protected]
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Lew Phelps N6LEW
Pasadena, CA DM04wd
Elecraft K3-10 / KXV144 / XV432
Yaesu FT-7800
[email protected]
www.n6lew.us
Generalized Law of Entropy: Sooner or later, everything that has been put
together will fall apart.
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