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
>
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>
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