Charlie, I will post my results. I had a vertical dipole up before and now am using the 40M GP. The vertical dipole "seems" to be the best performer for DX but what does that mean, hihi. I thought I would make a table with short path, long path etc. and switch to each antenna using the RBN. Any suggestions on other comparisons or set up ?
73, Bob K6UJ On Dec 15, 2012, at 10:25 AM, Charlie Cunningham wrote: > Well, I haven't done such an elaborate test, Bob! But I'd be extremely > interested in seeing your results! At present my 40 m GP is down because I > needed to clear away the radials for some tree work > > I still have parallel 40/30 vertical dipoles center fed through a W2DU style > current balun. When I had the 40m GP in place. I could do direct > comparisons. I was relying mostly on signal reports from 9V1YC other Asians > and ease of working him and others in south Asia on the evening south polar > path on 40m! > > Do let us know about your results! > > Regards, > Charlie, K4OTV > > > -----Original Message----- > From: Topband [mailto:[email protected]] On Behalf Of Bob K6UJ > Sent: Saturday, December 15, 2012 1:50 PM > To: 160 reflector > Subject: Re: Topband: raised radials > > 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] > _______________________________________________ Topband reflector - [email protected]
