Since vertical antennas favor lower angle signals,i wonder if a vertical antenna might be useful for logging stations on am frequencies that otherwise might not be heard ?I have seen helical vertical antennas for ham radio including 40 meters.I am wondering if there is a design in existance for MW frequencies.Metal whip antennas that come on some older cars are the only vertical type i have seen so far.Perhaps this is an area we can do some experimenting in.Of course one drawback might be that verticals are more prone to electrical noise pickup.Perhaps they would be helpful in quiter reception areas. Carl DeWhitt Maryville,Tn.