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#11
September 22nd 06, 06:49 PM
posted to rec.radio.amateur.antenna
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Yagi efficiency
Neat
Art Richard Clark wrote: On Fri, 22 Sep 2006 03:32:13 -0700, Roy Lewallen wrote: "efficiency" of the best HF antenna is better than 0.001% by this criterion. Hi Roy, Not far off. If absolutely EVERYONE (presuming 6 billion of us) on the planet got art's signal at S9 from a 100W transmission, that would only be 300 mW captured (0.3% efficient). I suppose the 99.7W lost would contribute to Intergalactic Warming (which would be 99.7% efficient). However, HF temperature is for all practicable purposes indistinguishable from absolute Zero. 73's Richard Clark, KB7QHC |
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