In a discussion of MIL-STD 810

K6LHA wrote:

A generalized statement like that indicates no experience with adverse
environments. One can "perform" like a champ at room temperature in a
residence environment but try it below freezing or in a vehicle that
has been in +118 degrees F all day (interior is MUCH hotter). I've
been
in both environments more than once and don't care to do it again, but
if there IS a need to have a radio perform, then I've had some
experience
in making them do just that.



Well, I've been out and about when the temps read -40 (your choice of F
or C) and I've been in cars where 118 (F) would have been "Cooling off"
and in both cases my ham radio hardware was working just fine

Though I do admit at -40 the car itself failed

And I put the transciever INSIDE my coat)(At least one of them, I was
"layered" that day since I was working parking lot detail) only the
Plantronics mic voice pick up tube was fully exposed, the mice itself
was under my hat