"Steve N." writes:

"Steve N." wrote in message
...

Rolf Brevig's choke is something I don't think I've seen before, but I
understand the concept. I can't tell, but I suspect it is common "1/4
wave
stub", no?

A 1/4 wave stub would work better, but be less simple to
fabricate. This design is trivial. It's just a coiled length of coax.

I also just realized that the choke is very similar to the Microwave
article's concept of simply opening the shield. I think that was your
point.

That was my point. But I now see that we're putting it at a high
impedence point, so the isolation is going to be far from perfect.

Anyway, my *real* point was that this was a useful antenna. Carry one
rolled up in your pocket and hang it from a tree to extend the range
of your HT. Cut one for 156.8 MHz and keep on your sailboat in case
you're dismasted. Etc.

73
LA4RT Jon