The coldest I've operated is probably about 20F (-7C). I've never seen any cold related issues with the KX3.
73, Barry N1EU On Wed, Mar 30, 2016 at 12:38 PM, Igor Sokolov <ua9...@gmail.com> wrote: > Barry, what was the lowest temperature you have used your KX3 without > noticeable deterioration of performance? > > 73, Igor UA9CDC > ----- Original Message ----- From: "Barry N1EU" <n1eu.ba...@gmail.com> > To: "Elecraft Reflector Reflector" <elecraft@mailman.qth.net> > Sent: Wednesday, March 30, 2016 8:23 PM > Subject: Re: [Elecraft] Operating temperature range ( second attempt) > > > No, many of SOTA activators have used a KX3 below freezing. We just >> haven't used one at -30C (-22F) like you originally mentioned. >> >> 73, Barry N1EU >> >> On Wed, Mar 30, 2016 at 11:02 AM, Igor Sokolov <ua9...@gmail.com> wrote: >> >> Thanks Brendon,Bob and Kevin. I am not worried about batteries. My LiFePo4 >>> were tested at minus 20 C and the drop in capacity is insignificant. >>> Looks >>> like nobody tested K3 or KX3 at below freezing temperatures so I will >>> have >>> to be the first :) A bit scary... >>> >>> 73, Igor UA9CDC >>> ----- Original Message ----- From: "Brendon Whateley" < >>> bren...@whateley.com> >>> To: "Igor Sokolov" <ua9...@gmail.com> >>> Cc: "Elecraft Reflector Reflector" <elecraft@mailman.qth.net> >>> Sent: Wednesday, March 30, 2016 6:50 PM >>> Subject: Re: [Elecraft] Operating temperature range ( second attempt) >>> >>> >>> >>> Hi Igor, >>> >>>> >>>> I think that some have operated at low temperatures in some winter >>>> competitions -- the US North East gets pretty darn cold -- similar to >>>> what >>>> you are talking about. I looked and easily found similar questions to >>>> yours, but no answers! >>>> >>>> The two things I'd be concerned about are the batteries and any >>>> electrolytic components that may be damaged by extreme low temperatures. >>>> The LCD screen will also stop working at low temperature, but I've never >>>> broken one by freezing -- but perhaps I was just lucky! >>>> >>>> I think batteries will have issues before most of the electronics. I'd >>>> suggest building a small insulated (expanded foam?) enclosure to hold >>>> the >>>> radio and battery. You could then stick some chemical hand warmers into >>>> the >>>> container and keep everything at a reasonable temperature. Look at how >>>> the >>>> "space balloon" people do things, they may have some tips. Alternatively >>>> keep the batteries in an inside pocket of your clothing. >>>> >>>> An email to the Elecraft guys may give some guidelines for temperatures >>>> that may damage components... but apart from those, I'd just give it a >>>> try! >>>> >>>> Good luck and let us know what you find out, so that we can answer the >>>> question next time it comes up. (I live in California at the moment and >>>> our >>>> harsh winter temperatures barely touch freezing at night!) >>>> >>>> - Brendon >>>> KK6AYI >>>> >>>> On Tue, Mar 29, 2016 at 9:20 PM, Igor Sokolov <ua9...@gmail.com> wrote: >>>> >>>> There were no responce to the initial message so I post it again: >>>> >>>>> >>>>> I have both K3 and KX3 and I sometimes use them outside in a field >>>>> operation. Here in Russia we have one funny QRP contest called >>>>> "Frost-red >>>>> nose" where extra points are given for low temperature environment >>>>> during >>>>> field operation. The contest happens in January when in some places >>>>> temperatures can be down to minus 30 C. I did not find temperature >>>>> requirements for K3/KX3 in the specs. Can somebody give me a hint or >>>>> may >>>>> be >>>>> share own experience. What would be the lowest temperature where the >>>>> rig >>>>> will still perform adequately? >>>>> >>>>> 73, Igor UA9CDC >>>>> >>>>> ______________________________________________________________ >>>>> 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 bren...@whateley.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 n1eu.ba...@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 ua9...@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 arch...@mail-archive.com
