Jim,
I will post the results here on the reflector. Note the changed subject for
this thread
to cover this activity. We have drifted away from the original thread.
Yes, please share your results on the 80 dipole and inverted L !
The RBN is a great tool available to us for testing our antennas.
If anyone can offer advice on how to do the best job of setting up and
collecting
the data from the RBN please jump in. One thing I know is to collect as much
test data as we can
so our results aren't based upon only one or two tests.
73,
Bob
K6UJ
On Dec 15, 2012, at 1:03 PM, Jim Koshmider wrote:
> Hi, Bob -
>
> If possible, I would like to be added to your list so I can receive info on
> the result of your tests.
>
> I will soon be running similar tests between an 80 meter center-fed dipole
> and an inverted L, and
> will be happy to share the results.
>
> Tnx es 73,
>
> Jim, K8OZ
>
>
>
> From: Bob K6UJ <k6uj@pacbell.net>
> To: 160 reflector <topband@contesting.com>
> Sent: Saturday, December 15, 2012 11:50 AM
> 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:topband-bounces@contesting.com] On Behalf Of Tom W8JI
> > Sent: Friday, December 14, 2012 2:24 PM
> > To: David Michael Gaytko // WD4KPD; topband@contesting.com
> > 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 - topband@contesting.com
> >
> > _______________________________________________
> > Topband reflector - topband@contesting.com
>
> _______________________________________________
> Topband reflector - topband@contesting.com
>
>
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