haven't been here on this forum for quite a while.
With all discussions on choice of HF antenna
(isolated backstay - whip vertical - sloping wire alternative backstay antenna
etc) - and using a 9.2m end-fed sloping wire myself - I was interested to find out what the radiation patterns are (horizontal & vertical) and the influence of the rigging
Have made a model of a 37ft sloop
including spreaders, lower shrouds, boom, guardrails, and modeled in 4NEC2 for several type of antenna's:
41 ft isolated backstay
41 ft sloper parallel to backstay
9.2m isolated backstay
9.2 m sloper
9.2m vertical whip (just for fun...)
7.2m vertical placed midstern - placed 0.3m from center - on side 1.5m from center.
Quite interesting to see the patterns from 2.2 Mhz up till 28 Mhz and directivity effects of the rigging
on some frequencies.
Anyone interested in the file? PM me jan dot de dot smet8 at telenet dot be
I am also interested to share conclusions with people who have done the same.