At 11:06 PM 2/3/2010 -0500, you wrote: >Bob, > >Indeed elevated radials *are* a part of the antenna (actually radials in >the ground are too). Elevated radials must be tuned (while buried >radials do not need to be). To do that properly, connect each one - one >at a time - and resonate it with the vertical element. When all have >been tuned, then they can be connected together. >To cancel the horizontal radiation component, the radials should be >oriented in opposing directions - any pair should be in a straight >line. 4 radials arranged 90 degrees apart is normally sufficient, and >in a pinch, 2 placed 180 degrees apart are sufficient.
Hi, Just as a side note .... I have used verticals with ground plane radials ... in pairs (4 radials work fb) ... to eliminate the horizontal radiation component. However an interesting version is a vertical with only 1 radial ... in other words an "L" antenna vs the more common inverted "L" which is usually worked against ground. I have used such an "L" antenna with the base about 15 ft off the ground ... the vertical portion apporx 26ft of self supporting (more or less) aluminium and the horizontal portion about 30 ft of copper wire. I fed the antenna with ladder line to a balanced antenna tuner. It has an almost omni directional pattern with both hi and low angle radiation. It is what you might call the middle of the road antenna ... e.g. general purpose. Very efficient on all bands and works well for local contacts with very good propagation at a distance. The antenna used to be featured in older antenna handbooks .... but disappeared as coax cable feed started to become the norm. Jim, VE3CI ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
