I also have a 40M GP with 4 elevated resonant radials 6" above the ground. I will be putting up a vertical dipole for 40M center fed with a choke balun for comparison on DX and will compare with the RBN and see what I learn. Has anyone on the forum tested these two 40M antennas using the reverse beacon network ? And if so what were your results ?
73, Bob K6UJ On Dec 15, 2012, at 5:45 AM, Charlie Cunningham wrote: > Hi, Tom > > Well, I also used a 40m GP with 4 elevated resonant radials about 6' above > ground and I worked an awful lot of really good DX with it!! I found it to > be about equal to my half-wave vertical dipole for 40m. (Center fed through > a home-made 1:1 W2DU style current balun) > > Charlie, K4OTV > > > > -----Original Message----- > From: Topband [mailto:[email protected]] On Behalf Of Tom W8JI > Sent: Friday, December 14, 2012 2:24 PM > To: David Michael Gaytko // WD4KPD; [email protected] > Subject: Re: Topband: raised radials > >> the more i read, it seems raised radials are a fairly easy way to >> raise the effeciancy of a short vertical. > > Only if the original ground system is a meager system with significant loss. > > At my QTH on 40 meters, 4 elevated radials at 6 feet above ground were about > equal to 12-15 radials in the earth. That would be like 4 radials 24 feet > above earth on 160. > > The difference between them was the elevated radials only worked OK on one > or two bands (like 40 and 15), while the buried wires were reasonably good > on 160-10 meters, out of view, and protected for lightning. > >> i have a hy-gain 18ht with base loading. can i use these raised >> radials with this antenna, and if so how to do it. it is impossible >> to raise the whole antenna to get the base off the ground. > > Since the antenna is an all band antenna, I don't think I would use a > resonant radial. I'd just bury as many radials as I could as long and > straight as possible, and enjoy all the bands. If you had 10-20 radials 60 > feet or more long, it would be tough to make any improvement on lower bands. > > If you use a resonant radial system, it really should be ground isolated. > That complicates things. > > This 10-20 loss thing, at least to me, appears to be based on anecdotal > unconfirmed opinions. Like deer whistles on cars. > > 73 Tom > > _______________________________________________ > Topband reflector - [email protected] > > _______________________________________________ > Topband reflector - [email protected] _______________________________________________ Topband reflector - [email protected]
