[Elecraft] Remoting KAT500 to base of antenna

[David Cutter]

>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" <kl7uw at acsalaska.net>
To: <Elecraft at mailman.qth.net>
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:
>     dubususa at gmail.com
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to d.cutter at ntlworld.com