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On Nov 6, 6:05 pm, (Rick) wrote:
My point was, a lot of people think that if they put up a vertical, even taking care to put a good radial field under it, and they get a low angle of radiation, they have the ultimate single element DX antenna. In fact, when you take losses into consideration a simple inverted vee beats it at all angle over 10 degrees and equals it below 10 degrees. I think that is a pretty significant statement. Rick K2XT The only thing is 16 radials is not really what I'd call a good radial field. After what I saw here, I don't even consider 32 radials as a very good radial field.. But when I elevated the antenna I did the see good DX performance. It greatly lowers the ground losses to the point just a few radials will do the job. It smoked my dipole on long paths. And as Roy says, I use mainly the receiver to check, and also I do use an A/B switch.. But I also got plenty of checks on my signal, and of course they matched the margins I saw on receive. My dipole was not at 60 ft, but at 36 ft. But to VK land the GP always beat the dipole by 4 S units. And I really doubt raising my dipole to 60 ft would have been enough to even the score. In theory, the ground losses of my GP at 36 ft with four radials should have been appx equal to a ground mount with 60 radials. This on top of the decent ground conditions. But I also have the advantage of having a clear shot at the horizon with no clutter in the way. I know the ground/space wave greatly increased when I elevated the vertical. I could work ground wave on 40m about 90-100 miles or so. Nearly half way from Houston to San Antonio. I'd be lucky to do 20 on the dipole. But another thing... And this may surprise you.. My 40m mobile antenna is better than my 36 ft high dipole at night if the path is over 800-1000 miles.. Tested it many times to make sure it wasn't a fluke. I don't know how it would fare on 80m to dx vs the dipole.. Never really tested it. I really don't work that much dx on 80m for some reason.. I'm usually working NVIS.. MK |
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