Charlie, Yeah I see what you mean they each have a different take off angle lobe. I will run a run a plot with EZNEC of each and see what they show.
I have changed/ started a new subject title for this activity we are discussing, we have taken off in a separate direction than the original thread. It will be interesting to see what we can find out. 73, Bob K6UJ On Dec 15, 2012, at 2:42 PM, Charlie Cunningham wrote: > Well, to me, Bob, the 1/2 wave 40m vertical seemed to be better - but not by > much! At the same time, though, it's worth noting that the base of the GP - > and therefore, antenna current maximum, was only 6-8 ft high whereas the > current maximum of the 1/2 wave 40m vertical was at about 38 ft and more > clear of obstructions. > > Charlie, K4OTV > > > > > > > -----Original Message----- > From: Topband [mailto:[email protected]] On Behalf Of Bob K6UJ > Sent: Saturday, December 15, 2012 2:58 PM > To: Charlie Cunningham > Cc: '160 reflector' > Subject: Re: Topband: raised radials > > 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] > _______________________________________________ Topband reflector - [email protected]
