oops, the images didn't come thru. See here:
http://www.ok1rr.com/public/DHDL_OPT.NEC
http://www.ok1rr.com/public/antview.png
http://www.ok1rr.com/public/dhdl_opt-ver.png
http://www.ok1rr.com/public/dhdl_opt-hor.png
http://www.ok1rr.com/public/dhdl_opt-3d.png
73,
Martin, OK1RR
Dne 30. 06. 19 v 20:51 Martin Kratoska napsal(a):
That statement doesn't agree with my quick modeling
just read a few articles about DHDL antennas. One article states, the
cut off frequency where the antenna becomes useless is when the
overall length of wire reaches a 1/4WL...
my results attached
73,
Martin, OK1RR
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