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:topband-bounces@contesting.com] 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: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
>
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> Topband reflector - topband@contesting.com
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