Quote:
Originally Posted by Billiam
Is there any way to tell which antennas offer better rejection of signals off the side?
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Look at the polar plot on the bottom left of this spec sheet.
http://www.winegard.com/kbase/upload/ya-1713.pdf
By convention the scale on the graph is a voltage ratio. The F/B has a voltage of .3 which is 10.5 db. That agrees with the channel 7 F/B listed in the table. The front to side ratio is about .2 in the areas of the interfering channel 7s. or about -14 db. The horizontal stack of 38.4" should increase that to at least -30 db.
Your real problem is that the signal strength of the two interfering stations fade up and down rapidly. TVfool is not designed to tell you the possible range of signal strengths. When the signal strength of both interfering stations waxes simultaneously, your desired channel 7 is wiped out.
In addition, expect more interference when the atmospheric conditions favor the distant stations. Generally, in the Midwest you'll see more interference in the summer and fall than winter and spring.
I'd expect the best reception of KQTV when the map over MO is black.
http://www.dxinfocentre.com/tropo.html
That would mean less signal received from the two co-channel 7s.