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:topband-boun...@contesting.com] 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:topband-boun...@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-boun...@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
>>>
>>> __
