Rich Wood wrote:
Does anyone know where I can obtain a plot of the antenna pattern for
a major (50,000 watt) commercial broadcast station?

Go to www.fcc.gov. There's an AM database that has the information and
patterns for all stations.

Y'know, that's where I was going to send him, but...

The patterns *aren't* there.

OK, there's a table that shows the relative field every (5? 10?) degrees
of azimuth, and I suppose you could plot it yourself.

For FM and TV stations, they *do* have the DA patterns...

I usually use Bob Carpenter's AMSTNS program.
http://home.earthlink.net/~lvehorn/
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com