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#21
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But, it has the same gain as the dipole when both are configured the
same for Az and El. BTW, the gain off the end of a rotatable dipole is the same as the gain off the end of a fixed dipole. When modeled in EZNEC, I don't see an input for rotatable dipole!!! If the X,Y,Z coordinates are the same then the gain is the same. Rotate both 90 degrees and the gain is still the same. Trolling tonight is very poor. The Red Sox are playing. I don't know whether to be happy or sad. Deacon Dave, W1MCE W5DXP wrote: Dave Shrader wrote: The gain of a dipole is the gain of a dipole. Yes, and a fixed dipole doesn't have much gain off the ends compared to a broadsided rotatable dipole. EZNEC says the maximum gain of my dipole off the ends is "MAX GAIN = 0.88 dBi". I am extremely pleased with my rotatable dipole. So much so that another element is just not worth that extra half an S-unit. |
#22
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Roy Lewallen wrote:
Having two lobes is way different than radiating only in two directions. Depends on the defined courseness of the directions. With my rotatable dipole running North-South, it only radiates well in two directions, East and West, which is approximately half of the two out of four possible course directions. -- 73, Cecil http://www.qsl.net/w5dxp -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 80,000 Newsgroups - 16 Different Servers! =----- |
#23
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Dave Shrader wrote:
BTW, the gain off the end of a rotatable dipole is the same as the gain off the end of a fixed dipole. Thus the advantage in being able to rotate it. -- 73, Cecil http://www.qsl.net/w5dxp -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 80,000 Newsgroups - 16 Different Servers! =----- |
#24
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Cecil,
Since mine isn't at the 'optimum' height, I hear stuff from all around me. 'Doc |
#25
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Jim, If you follow the 'normal' rules for using twin- lead feed line you shouldn't have any more (or any less) problems than if you used coax. There is always the possibility that RF will 'eat up' all the electrical appliances in your house, but maybe not. Nothing except your pocket says you can't change feed lines or antenna if you want. So, try it and see what happens... 'Doc |
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