Actually, my antenna is similar. 28 Foot tall alum. radiator over a field of sixteen 20 foot radials. Thirty feet of RG-213 connect the antenna to the manual ATU in the garage. From there I run RG8x into the shack. Changing bands requires that I go to the garage with my antenna analyzer and adjust the ATU to get a match on the band I wish to use. Some bands tune easier than others (80 is very tough, 20/17 are touchy). The antenna works well on 40 & 30, adequate on 20, 17, 15 and quite poorly on 80.
Lately I've come across info that suggests that verticals taller than 3/8 wave perform poorer than 1/4 wave unless the ground conductivity in the Fresnel zone is very good. With that, I've been playing with changing the height of the antenna to see how it compares to my reference inverted vee. So far, raising the antenna from 1/4 wave to 3/8 wave resulted in signals being either the same or slightly weaker. That suggests a WARC vertical should be 18 feet tall. Or one could cover 10-80 with 2 verticals with base mounted tuners; one 12 feet tall (20-10) and the other 32 feet tall (30-80). - Keith - -----Original Message----- From: Rich I installed a 29' home brew self supporting vertical on one of my fence posts. I then ran two elevated radials along the fence at 90 degrees, one to the north and one to the east. Both are about 30' long. I use an SGC-239 auto tuner ... at the base of the antenna ... mainly for the WARC bands. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
