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Reg wrote among other stuff:
You've been reading books and magazines about rules-of-thumb written by old-wives. At 3.62 MHz and a radial length of 16 metres the attenuation approaches 100 decibels. So there's no current flowing in the radials beyond 5 metres. You can remove the excess 12 metres. They are not doing anything. What small current density there is beyond 5 metres is all flowing in the soil. The cross-sectional area of the soil carries the small current just as well as the radials. ========================================== Yes. Use the program to calculate efficiency with the extra 20 radials. Assume all the radials are 5 metres long. But you may not think the meagre 3% or 0.13dB in efficiency is worth all the labour and back-ache. By now you are beginning to appreciate how useful the program is. ========================================== Reg, NEC4 engine can accommodate on the ground or buried radials in modeling and calculating vertical antenna parameters and performance. I bet Roy has his hair standing up, or perhaps still trying to recover from the "appreciation" of your program, unless he is still running calculations :-) You are trivilializing, ignoring 100 years or so of vertical antenna research, measurements and misleading innocent users of your program. You might be right in calculating the resonant frequency of piece of wire in the dirt, but that is far from its contribution to the vertical antenna performance and efficiency. You better switch to some better quality vino and read up on the subject. :-) Yuri K3BU |
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