[Elecraft] Remoting KAT500 to base of antenna

[David Cutter]

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" <lew at n6lew.us>
To: <Elecraft at mailman.qth.net>
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 <d.cutter at ntlworld.com> 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" <kl7uw at acsalaska.net 
>> <mailto:kl7uw at acsalaska.net>>
>> To: <Elecraft at mailman.qth.net <mailto: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
>>>
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>>
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>> Message delivered to lew at n6lew.us <mailto:lew at n6lew.us>
> Lew Phelps N6LEW
> Pasadena, CA DM04wd
> Elecraft K3-10 / KXV144 / XV432
> Yaesu FT-7800
> Lew at N6LEW.US
> www.n6lew.us
>
> Generalized Law of Entropy: Sooner or later, everything that has been put 
> together will fall apart.
>
>
>
>
>
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