On Tue, 28 Feb 2006 10:10:15 GMT, Ron Hardin
wrote:

WFAN 660 (NYC) early in the morning, listening in Ohio, has a pretty
loud AC hum along with it, except I can put an antenna null on it
and take the hum out without taking out WFAN.

Which suggests some (probably Cuban) other station is putting out
a hefty AC hum. I don't hear the other station audio otherwise, however.

This started Monday morning, and is still there today Tuesday.
Is it audio hum or carrier beat? Is it exactly 60 Hz?