But might not this re-introduce the surface tension problem? Lew N6LEW
> On Jan 20, 2016, at 10:18 AM, David Cutter <d.cut...@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" <kl...@acsalaska.net > <mailto:kl...@acsalaska.net>> > To: <Elecraft@mailman.qth.net <mailto:Elecraft@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: >> dubus...@gmail.com >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@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.cut...@ntlworld.com <mailto:d.cut...@ntlworld.com> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > <http://mailman.qth.net/mailman/listinfo/elecraft> > Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm> > Post: mailto:Elecraft@mailman.qth.net <mailto:Elecraft@mailman.qth.net> > > This list hosted by: http://www.qsl.net <http://www.qsl.net/> > Please help support this email list: http://www.qsl.net/donate.html > <http://www.qsl.net/donate.html> > Message delivered to l...@n6lew.us <mailto:l...@n6lew.us> Lew Phelps N6LEW Pasadena, CA DM04wd Elecraft K3-10 / KXV144 / XV432 Yaesu FT-7800 l...@n6lew.us www.n6lew.us Generalized Law of Entropy: Sooner or later, everything that has been put together will fall apart. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@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 arch...@mail-archive.com
