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Walter Maxwell wrote in message
I'm saying there is no such device as an 'EH' antenna. Oh, I agree totally. I consider it no different than any other small loaded antenna stuck on top of a tower. Well, except that it's less efficient than many... ![]() semi-sham also. Not really due to problems from the test consultants, but from including an obviously radiating structure and feedline with this antenna during the test. This *requires* the same height tower "90 ft" to be included under the antenna in order to match the results they show. Dunno, they may have done a decent job of testing, but someone in the office should have noted that the obviously radiating tower and feedline would skew the results. They use no decoupling of the feedlines. In their info, they never state that a tower is a required section of this antenna. They consider it only a support, and they claim it or the feedline doesn't radiate. If I had been the test consultant, I would have demanded the antenna be placed on a non metallic structure, and to either have the transmitter at the feedpoint, or use a well decoupled feedline. If they refused, I would have declined the job, being I would have realized the results would be not a result of the small antenna, but also include the radiating tower and feedline. And thus be pretty much of a joke if you really want to test the antenna alone on it's own merits. And to add insult to injury, the comparison low tech B/C tower won the contest. I have seen notes that he states these antennas could be roof mounted. I wonder what he will use as the *main* radiator in this case, if there is no 90ft tower on the roof. I guess the radiation from the feedline will have to do the job...Which could be partly indoors, and could even be shielded by metal in places. Hot shack RF wise too I bet. Most real world E/H tests mention this problem. What a mess... :/ I don't see broadcast stations lining up for this system. Only a few gullable hams... ![]() |
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