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d an antenna radiation
resistance of 0.2 ohms, assuming a lossless matching network and radiator, I get an efficiency of 12% over PERFECT earth. Taking the ground reflection losses into account over average ground, it's about 5%. This is assuming PERFECT matching network and a very good (maybe new hams out there take their 38 bucks and apply it to their inverted L project for 160m, or a copy of ON4UN's low band DXing book Great advice Dan. That book, in my opinion, is the finest book ever written concerning practical information for the HF operator. And I have read them all. You know, one thing that impressed me (and there were many) in that book is where he admitted that previous versions were wrong in telling us there was benefit to sloping the end of a Beverage antenna down to the feedpoint. Simply running it vertically down is the same. To readers of this newsgroup, if you have only read previous editions, you should get the new one. It is completely rewritten. Rick K2XT |
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