On 1/3/20 5:05 PM, David Gilbert wrote:
I did the EZNEC model again using perfect ground. The ground losses
were indeed a couple of dB lower in every case, but if anything the
differential between the various versions (#18 copper versus #20 copper
versus #18 Copperweld) became narrower and therefore even less
consequential.
And as you say, EZNEC tries to account for skin depth anyway ... which
by the way is of course less at 80m (N2TK's situation) than 160m.
at 4MHz in copper, 1.3 mils (goes as sqrt(f)),
The
Copperweld spec sheet says that there is about 4 mils of copper on #18
Copperweld wire.
3 skin depths, 95% of the current is in the copper.
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