dxAce wrote:


You may wonder how one can get a catch on the BCB MW band so far away,
as the theory of "skip" shows it is not possible. But there is another
theory that by "ducting" is how the signal arrives so far away. In
this theory the signal from the transmitter gets caught up in the
ionosphere and travels huge distances in it before randomly coming
back down to earth. How you catch these faint ducted signals is pure
chance and requires a bit of diligence by the operator, and of course
luck and a good antenna.

I've long believed in 'ducting' vs. the signal making 'hops' or 'bounces'.

dxAce
Michigan
USA



I get KOMO in Seattle (1000 kHz) via some kind of virtual waveguide.
There is never any selective fading. It sounds like groundwave. They
are 900 miles away. I think the Central Valley, the Pacific Ocean, and
the Rocky Mountains have something to do with it.

Ducting is responsible for a VHF path between Los Angeles and Hawaii.