Most of the old (what used to be actually clear) clear-channel stations
are omni-directional.

A while back, I looked up one in Dallas and it has a humongous array for
daytime and an entirely different almost-as-large array at night. The pattern
must look strange on each, and each are sort of directional.

I think I'll go back and try to find in my files the call sign of that station
and then recheck on it.

Bill, K5BY