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Bob, I'm not sure exactly what you've said here recently, per your new project. But, I may have just jumped into the middle of you business. Sorry!


But, I'm curious at to what specific lengths for the radials you plan to consider when checking or comparing your results? 


Or, are you talking about Henry's and W8JI's ideas about radials being necessary and thus interested in adding more radials below the NV4K/Sigma4 that will make for improved performance?


What happened to the idea old ideas of making the loop bigger or making the radiator longer to get better results?


I recall modeling the Vortex M2 I think...and I found them likely puffing about those results being well overstated at 4.50 dbi or more...as best I can recall.