Hi Jim,
Yes, I've heard of knife-edge refraction, but the instance I was referring
to in the article had a real positive benefit. As I recall, the operator
went from zero contact to satifactory contact by hooking up 2 beams
back-to-back at the summit, with one beam pointing back at him - and the
other beam pointed to the otherwise unreachable distant repeater.
I wouldn't have thought something like that would work without some
signal amplification. But it does.



How critical would the matching on those beams have to be? I am
wondering if maybe a 300 ohm wire could run from DE to DE on the two
beams.


--
73 for now
Buck
N4PGW