Quote:
if I replaced my cm3020 with a winegard hd7698p, how much better would it be?
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I don't really know, because there are so many factors involved. All I can do is go by the listed gain figures for the two antennas.
CM 3020
http://www.channelmaster.com/Digital..._p/cm-3020.htm
Bandwith 54 to 216 and 470 to 700 MHz
VHF Gain 8.6dB
UHF Gain 9.5dB
HD7698P
http://www.winegard.com/kbase/uploads/HD7698P.pdf
Average VHF gain 11 dB
Average UHF gain 13 dB
Quote:
What would be even better than the winegard? this would be for UHF only.
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The current King of the hill for UHF gain is the Antennas Direct DB8e with both panels aimed in the same direction.
https://www.antennasdirect.com/cmss_files/attachmentlibrary/Technical%20Data%20PDF's/DB8E-TDS.pdf
I'm not certain that it would make that much difference for most of your channels except maybe for WVIT.
Every reception location is unique; you must expect that you will need to do some experimentation. I can not give you a guarantee.