[Elecraft] T1 Operational Temperature Limits?

[Fred Townsend]

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: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of GeorgeP1111
Sent: Monday, August 01, 2011 8:41 PM
To: elecraft at mailman.qth.net
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

pasek001 at umn.edu


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