Ted Jensen 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 your local station and ask to look in the public inspection file.
There should be one there. If you ask the engineer nicely (and they are
a station that still has an engineer), he might also have some old proofs
so you can see how widely the pattern varies from year to year.

Be aware that the plot for a 50KW station on a stick in Montana will be
radically different than the plot for the same transmitter and tower in
Arizona. Which is what makes it fun.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."