There are differing opinions on whether mountains have any significant
effect on MW or HF (shortwave) reception. The ground (soil) conditions may have
more influence than the terrain.

I cannot disagree with anything you wrote. G It's one of things that make a
regular search more meaningful. For starters, he should seek out that 50kw
Dallas station, WBAP on 820 kHz, mentioned in another thread. If that blow
torch can't be heard in Malibu at night, then the Rockies, if not the closer
mountains, will be the boundary for easterly stations.

Bill, K5BY