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On Wed, 14 Jan 2004 11:01:47 GMT, "W3JDR" wrote:
Richard: "One can observe a gain relative between two antennas and this would require significant differences in the two patterns. " I believe this is in line with what Ted says...the EH purportedly has vertical adjustable pattern depending on the length to diameter ratio of the cylinders. That can only be a function of physical size and wavelength, or of physical distance between sources (emitters) in terms of wavelength. Neither condition exists (the antenna is small, and is only one source). Beam steering and beam focusing antennas exhibit BOTH of these characteristics, the eh neither. "However, the data from the FCC methods of testing prove there is no difference. " Well, that's the way I interpreted the data too. However, I don't believe this was a 3 dimensional measurement, was it? Hi Joe, There is little point in speculating about radiation straight up. If that is the only benefit to the antenna, it is certainly no benefit to the listener (definition of a Dummy Load). Field tests prove the listener enjoys no advantage from this speculative gain. Simple fact of the matter is revealed at the test site. Are they using an eh, or the standard quarterwave over standard radials? The acid test of capitalist greed has eroded these fairy-tale claims. 73's Richard Clark, KB7QHC |
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