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#1
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#2
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= = = Richard Clark wrote in message
= = = . .. On 6 Jul 2004 11:02:19 -0700, (RHF) wrote: Yes I have an 'ego' and apparently your have an "EGO" too. Certainly, mine is earned. RC - I am 'certain' that you "Believe" that. .. .. Hey, I try to be helpful and keep things positive. Posting as a substitute for Prozac, or is it Lithium? RC - You again seem to be the 'expert' in his area of endeavor. .. .. I did not play Twenty Questions : I posted three. Hmm, a matter of degree not substance. As for substance I note you have no interest in engaging the outcome of your questions' answers nor in pursuing the technical claims of your submitted eh antennas. RC - The topic became EH Antennas, and I posted "Links" for the original poster to go to and explore that subject; if that was his continued interest. I am sure that a YAHOO eGroup with over 600 Members and more than 4600 Messages posted; will provide more information then I could. "EH Antennas" eGroup on YAHOO ! http://groups.yahoo.com/group/eh-antenna/ .. .. So I will respond to your style and expose your weakness in that regard too. ;-) RC - What Ever Winds Your Clock. .. .. For some the EH Antenna may be a matter of 'faith' and to the extent that it "Works" in some form or fashion: Hey It WORKS ! Your technical details valid or not, have very little relevance to them and 'their' EH Antenna. Rabbit ears for AM reception WORK for the faithful too. RC - When all you have is a single short WHIP Antenna built into your 'portable' AM/F/Shortwave Radio. A pair of "TV Rabbit Ears" properly connected to the radio; may indeed function better as an Antenna. Hey What Works, WORKS ! .. .. Such a recommendation! It's like short-changing the blind to teach them self sufficiency. RC - If the Motive and Goal is "To Teach" and not to 'steal'; and if the Lesson is Learned. Then dealing with the realities of the world is part of 'being' Self Sufficient. .. .. So Say I - My Opinions Stated as Facts ~ RHF Actually "so write you." RC - That is True. .. .. No one can hear you scream on the internet. RC - That is true, but they may see you SCREAM :-[] .. .. For others following the poor quality of discussion surrounding the eh antenna; this design has been field tested, studied and analyzed quite thoroughly on rec.radio.amateur.antenna. RC - They may wish to also seek an 'alternative' view point from the EH Antennas eGroup on YAHOO; with it's 600+ Members and more than 4600 Messages posted. "EH Antennas" eGroup on YAHOO ! http://groups.yahoo.com/group/eh-antenna/ .. .. It is quite an education to simply look at the field data offered by the proponents themselves (who are just as incapable in reading engineering reports as any Yahoo). RC - Yes as you have 'noted' I am Yahoo. .. .. For the sheer bulk and complexity of the eh design, their own reports shows it to be fully 0.1% to 1% efficient compared to a simple design. Of course, few of you may be capable of erecting this simple design. RC - For those who wish to seek an 'alternative' view point from from yours. I would suggest that they check-out the "EH Antennas" eGroup on YAHOO; with it's 600+ Members and more than 4600 Messages posted about the EH Antenna by actual users of the EH Antenna. "EH Antennas" eGroup on YAHOO ! http://groups.yahoo.com/group/eh-antenna/ .. .. However, going to the trouble with the eh when you could as easily use rabbit ears purchased at Radio Shack must bring with it what Yahoo cites as the misty-eyed boon of faith (which accounts for easily 20 over S9 signals in an S1 field of noise where the faithless only hear static). RC - When all you have is a single short WHIP Antenna built into your 'portable' AM/F/Shortwave Radio. A pair of "TV Rabbit Ears" properly connected to the radio; may indeed function better as an Antenna. Hey What Works, WORKS ! .. .. Henceforth we can call these designs Faith-Gain Antennas. RC - Considering the amount of Religious Programming on the Shortwave Bands. A "Faith-Gain" Antenna just may be the type of Marketing Buzz Word that will sell an Aerial type Product at a Heavenly Price. Faith-Gain Antennas - How They Work... God Only Knows ? ? ? .. .. It means that if you discard tuners, preselectors, tuned antennas, and simply use a wire coat hanger; that if you squeeze your eyes hard enough and fall to your knees with folded hands held slightly above brow level, then you too can enjoy the melodious tongues from other lands communicating to your inner heart RC - Ah the Things that Dreams are made of . . . .. .. - don't forget to turn on the radio. RC - Thank You I Won't. .. .. 73's Richard Clark, KB7QHC ~ RHF .. |
#3
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#4
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#5
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On Wed, 07 Jul 2004 11:12:37 -0700, Jim Kelley
wrote: All can probably also agree that you seem more interested in your correspondent than in antennas. Feeling left out Jim? What you say is true and I could become interested in you as well as you don't have much to say about antennas either. But not very interested, so don't get any false hopes up. Instead, pick a topic and avoid this soap opera. ;-) 73's Richard Clark, KB7QHC |
#6
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![]() Richard Clark wrote: On Wed, 07 Jul 2004 11:12:37 -0700, Jim Kelley wrote: All can probably also agree that you seem more interested in your correspondent than in antennas. Feeling left out Jim? I'm feeling out left......here in SoCal. :-) What you say is true and I could become interested in you as well as you don't have much to say about antennas either. I'll wager I have less to say than you do on just about any subject. :-) But not very interested, so don't get any false hopes up. Instead, pick a topic and avoid this soap opera. ;-) Roger. In fact, I was trying to encourage you to avoid them! 73, jk |
#7
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On Wed, 07 Jul 2004 13:54:41 -0700, Jim Kelley
wrote: Roger. In fact, I was trying to encourage you to avoid them! Hi Jim, Good advice. 73's Richard Clark, KB7QHC |
#8
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Jim Kelly wrote,
All can probably also agree that you seem more interested in your correspondent than in antennas. jk That's a cheap shot, but it's a cheap shot worth thinking about. Sometimes the users's expectations and expertise - or lack thereof - are the deciding factors in whether something "works" or not. The EH antenna may work for some people in the way that homeopathy, brightly colored sugar pills, and other quack remedies work in medicine, but Richard is right, the technical qualities of antennas can't be revealed by testimonials or protestations of faith. 73, Tom Donaly, KA6RUH |
#9
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Tdonaly wrote:
Jim Kelly wrote, All can probably also agree that you seem more interested in your correspondent than in antennas. jk That's a cheap shot, but it's a cheap shot worth thinking about. Sometimes the users's expectations and expertise - or lack thereof - are the deciding factors in whether something "works" or not. The EH antenna may work for some people in the way that homeopathy, brightly colored sugar pills, and other quack remedies work in medicine, but Richard is right, the technical qualities of antennas can't be revealed by testimonials or protestations of faith. I read a couple pdf's on the things where a couple hams tested 20 meter backpacker against a dipole. When the test signals were coupled with a very short length of coax to the antenna, the EH didn't perform well at all. When coupled with a 1 wave length of coax, the feedline radiated, but not very efficiently, around 1% as efficiently as the dipole, IIRC. Forgive the numerical blunders, it was late, and I might have slipped a number or two! 8^) A long coax version fared better against a vertical in a second test, but in all fairness, the vertical had a pretty lousy ground. But okay, the thing worked. The authors concluded that what they had was a tuned circuit on the end of some coax, and the coax radiated more so than the antenna. This sounds almost like aa halfwave antenna with it's tuned circuit. Any relation there? All in all, it sure seems like a lot of trouble for a so-so antenna, and since I don't particularly like RF burns and radiating coax, I think I'll pass! 8^) - Mike KB3EIA - |
#10
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But okay, the thing worked. The authors concluded that what they had
was a tuned circuit on the end of some coax, and the coax radiated more so than the antenna. This sounds almost like aa halfwave antenna with it's tuned circuit. The problem with the EH and CFA as has been pointed out many times is the claim to provide Electromagnetic radiation through Poynting Vector Synthesis. They produce the E and H field seperately and combine the two in the antenna to produce EM radiation. The claim is with this Synthesis, high radiation efficiency is produced from a very small antenna, the Holy Grail, a small efficient antenna. If someone gets results from one of these antennas, it is due to feedline radiation, so they will proclaim "it works". But it does not work because of Poynting Vector Synthesis as claimed. There are a number of ways to get your feedline to radiate, the EH antenna could be one of the better ones, along with the commercial Bilal Isotron. 73 Gary N4AST |
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