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Richard Clark wrote:
wrote: Does a folded dipole antenna have the same low noise characteristics as a loop antenna? Yup, the same as a standard Dipole. Assume you meant: "the same as a standard loop."? -----------== Posted via Newsfeed.Com - Uncensored Usenet News ==---------- http://www.newsfeed.com The #1 Newsgroup Service in the World! -----= Over 100,000 Newsgroups - Unlimited Fast Downloads - 19 Servers =----- |
#2
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Does a folded dipole antenna have the same low noise
characteristics as a loop antenna? Yup, the same as a standard Dipole. Assume you meant: "the same as a standard loop."? Yes, I hope that he meant "loop" instead of "dipole" . I still would like to hear from others on this, too. I am re-considering my planned installation of a loop now, in favor of the tactically easier to install folded dipole, if I can maintain that low noise charactistic. Ed K7AAT Ed |
#3
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On Mon, 20 Dec 2004 22:25:43 GMT, Ed
wrote: Yes, I hope that he meant "loop" instead of "dipole" Hi Ed, Aside from the charged particles introducing noise, there is no difference. If charged particles is the noise, then I offered a solution that reduces the issue of antennas to: no difference. If it relates to corona discharge, then you may have to ask yourself, what about the difference between corner fed and center fed loops (this made a huge difference to HCJB in Quito). Just tossing out the term "low noise" is in itself a reliance on hopes and wishes to sort out what the noise is. This is because forcing the discussion into more context invariably reveals the old nostrum of magnetic antennas being immune from electrical noise. Then we get into all sorts of equivocation which in the wash inevitably reduces to: no difference. 73's Richard Clark, KB7QHC |
#4
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Richard Clark wrote:
wrote: Yes, I hope that he meant "loop" instead of "dipole" Aside from the charged particles introducing noise, there is no difference. Point is that a loop reduces that "noise" where a dipole allows the "noise" to build up until it arcs across the coax connector which causes an extreme amount of "noise". One night in AZ, my PL-239 connected to my IC-745 was arcing so loud that it woke me up. I disconnected it and tossed it on the floor. A few minutes later, the carpet was smoking. Aside from the arcing waking me up and the burning of the carpet, there was no difference. -- 73, Cecil http://www.qsl.net/w5dxp -----------== Posted via Newsfeed.Com - Uncensored Usenet News ==---------- http://www.newsfeed.com The #1 Newsgroup Service in the World! -----= Over 100,000 Newsgroups - Unlimited Fast Downloads - 19 Servers =----- |
#5
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Ed wrote:
Does a folded dipole antenna have the same low noise characteristics as a loop antenna? Yup, the same as a standard Dipole. Assume you meant: "the same as a standard loop."? Yes, I hope that he meant "loop" instead of "dipole" . I still would like to hear from others on this, too. I am re-considering my planned installation of a loop now, in favor of the tactically easier to install folded dipole, if I can maintain that low noise charactistic. You can get the same effect with a dipole by installing a toroidal inductance (RF choke) across the feedpoint or (surprise) by using a 4:1 voltage balun. Back when I didn't know any better, I used a 4:1 voltage balun and it was quiet but ineffective as a balun on some bands. Things got noisier when I switched to a 1:1 choke. An RF choke solved the problem. -- 73, Cecil http://www.qsl.net/w5dxp -----------== Posted via Newsfeed.Com - Uncensored Usenet News ==---------- http://www.newsfeed.com The #1 Newsgroup Service in the World! -----= Over 100,000 Newsgroups - Unlimited Fast Downloads - 19 Servers =----- |
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