Doug, You didn’t specify which “K” radio you were inquiring about. My K4D manual page 45 says: 0 C to 50 C or 32 F to 122 F. The K3s manual specifics 0-50 C for frequency stability. The K2 manual does not mention operating temperatures. The KX3 manual does not specify. I checked the non “K”, IC-7300 manual and operating range is stated as: -10 C to +60 C or +14 F to +140 F just for a sanity check. To be safe, keeping the radio above freezing is a good idea. I would think that condensation or moisture of any kind is the enemy in the cold. Storing and operating are different things.
That said, I worked on a military radio that mounted in the 47 section of the B-52D, F with no environmental controls. It was subjected to 50,000‘ altitude and -50 C, F . The failure rate of that radio was much greater than the same radio that was in the pressurized and air-conditioned in a forward section of the aircraft. I might add that these radios were electrically tuned to a frequency using DC motors and heterodyned crystals (the AN/ARC-34) and it was almost always the tuning that failed. These radios were in tropical conditions in Guam or Thailand when not flying. They used sub-miniature tubes about a third the size of a miniature tube. 73, Bill-AK5X > On Jan 13, 2024, at 9:22 AM, Doug Hensley <w...@hotmail.com> wrote: > > What minimum temperature should a K station be kept at during a hard freeze > and is there a cold temperature point at which it should not be powered up? > > Please reply to the list and as always do not reply to a digest. Thanks in > advance > for any information. > > 73, Doug W5JV > > > > > > Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds. > > > ______________________________________________________________ > 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 a...@me.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
