Richard wrote:
 I'm trying to receive some a distant FM stations, but I have  locals
 0.1Mhz away that block the desired station out.  I could try to use a big
 gain directional yagi, but perhaps the solution is to make use of a null.
 Anyone know of any antenna system that would produce a real good null  in
 the FM band?  Would that be to try for a cardoid pattern? Or is there
 something better than that?
I think these might provide a solution:
http://www.geocities.com/toddemslie/...ncellation.htm
http://www.anarc.org/wtfda/stagger.pdf
http://pages.cthome.net/fmdx/phase.html