George: I don't see a big problem with low temps. In my younger years I used to do a lot of environmental testing for locations around the world including the north slope of Alaska. Most components work very well. Things like CMOS slow down a bit when they get hot so cold is better. The gain of transistors does fall off a bit when cold but that is seldom a problem. The things we had the most problem with were not semiconductors. Vinyl and some other plastics get very brittle at even moderately low temperatures. Things like LCDs may have a problem. LCDs definitely get cooked by uv so you will want to protect from sustained direct sunlight. Finally switches and other mechanical devices that are lubricated need to be relubricated with a silicon base grease rather than a carbon base.
BTW the military now uses a lot of COTS products. COTS means Commercial Off The Shelf. That's mostly because COTS works well and is a whole lot cheaper. de Fred, AE6QL -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of GeorgeP1111 Sent: Monday, August 01, 2011 8:41 PM To: [email protected] Subject: [Elecraft] T1 Operational Temperature Limits? I'm just about ready to put up a 44' Doublet and feed it with 300 ohm Twin Lead. I'm going to connect the Twin Lead to a balun and the T1 at the base of the Doublet mast and run about 35' of RG213 back to the shack and my FT-817ND (soon to be a KX3). I was wondering if the T1 could withstand the cold temperatures we get here in Minnesota. I wrote Elecraft Support asking if there were any specs or if they thought a temp of -30 to +100 F would cause any problems. Dale responded, "We do not have any real information on what the temperature limits are, so we suggest you post on the reflector and ask for input from other T1 users who have over the years had T1's out in varying environmental conditions." Any "Snowmen" out there? Also.... I'll be needing a BL2 balun so if someone has one they don't need/use, drop me a note off list. tnx de George WD0AKZ [email protected] -- View this message in context: http://elecraft.365791.n2.nabble.com/T1-Operational-Temperature-Limits-tp664 3567p6643567.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
