Quote:
Originally Posted by EscapeVelocity
The numbers Ive seen from a NEC model is 7.5 dbd on Channel 7, slightly higher through the middle of VHF Hi and a dropoff on channel 12 and 13. However this dropoff is suspect, as the Winegard 10 element VHF Hi antenna also displayed this, and its great on 12 and 13.
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I own two of those 10 element Winegards stacked 40 inches over each other. Winegard suggested 42 inches for channel 11. My calculations said 40 inches for the center of the band or channel 10 . I don't think 2 inches makes that much difference on VHF. 10 inches does. I experimented at 60 poor no better than one antenna, 50 no more gain but less drop outs, the at 40 inches I saw the gain pop alive.
I use my on channels 7,9,10, 13 and I don't think I agree with Ken's modeling that they don't have gain on Channel 13, it's one of my best channels. Though they pick up a 18
KW stations at 61 miles that is 2 edge from a 300 meter tower. Well unless there is tropo or impluse.
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