Jeff Liebermann wrote:
On Mon, 19 Jan 2015 11:09:21 -0700, Irv Finkleman VE6BP
wrote:

Thanks a lot Jeff -- your posts are always helpful and informative. In
particular, you don't just post instructions on what to do, but you
provide good supportive reasoning which I am sure has been of value
to many on the group.

Thanks. That's what I try to do. One line "do this" type answers are
useful, but without the explanation and logic behind the
recommendation, it's of little use. Besides, if I just supply the
logic, and let you make the decision, and it doesn't work, it's YOUR
fault for accepting my logic, and drawing the wrong conclusion. It's
much like getting an opinion from an attorney. You'll never get just
one option or recommendation. Instead you get a fair number of
"options" among which you're expected to choose. If you pick the
wrong one, it's your fault, not the attorney's.

I'll do a little reading and testing later this week on the different
types and thickness of LDPE sheets:
http://www.bagbarn.com/all_purpose_poly_bags/garbage_bags.php
Some are probably better than others. If you have an incandescent
bulb flashlight (heat source) and digital IR thermometer gun, you can
probably do your own testing. However, I don't want to get it too hot
or it might melt the loop circuitry. That's also another reason to
keep the bottom open, so that it won't overheat. I suggest testing
the garbage bag over a thermometer in a cardboard box simulation of
the loop, before trying it on the real thing.

Note: I used to design marine radios and therefore know something
about waterproofing.

I was in the Navy for 26 years and just learned to tolerate the moisture.
Besides, all our outside electronic equipment was pretty well taken
care of with nitrogen gas! A little more than a ham needs to deal with!

Irv