There is a lot that comes into play. How far was the dipole above
ground, hhow good is the ground as far as rf conduction and so forth.
Also, swr doesn't necessarily mean antenna radiates well, a dummy load
is 1 to 1. One of the best antennas I had on 75 before the big tower
came down was an inverted v, peak up about 80 feet. I had a
counterpoise about 5 percdent longer, I think two tenths of a wave
length below that, not sure either was 1 or two, anyhow, put up that
reflecter or counterpoise and the antenna really worked well for local
contacts. Not saying grounding isn't good, it is, I've just never
persued it all that much. Absolute protection, unhook equipment, power
and antenna.
73
Butch
WA0VJR
Node 3148
Wallace, ks.
On Thu, 25 Jun 2015, REV. Mark Torgerson wrote:
> Hi
>
> Here is my analysis of grounding a dipole. When I had my
> dipole up with out a ground at the station or the antenna, the SWR was 1.5
> at MHz 7.191 I installed a station ground and the SWR went to 1.4. I then
> connected the antenna to a second ground rod, and the SWR dropped to 1.2.
> Thus, the old theory about dipoles being self contained, needing no
> grounding just doesn't hold water with me.
>
> Just my personal experience.
>
> God bless,
> REV. Mark
>
>
>
> --
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> -----Original Message-----
> From: Pat Byrne
> Sent: Thursday, June 25, 2015 9:40 AM
> To: [log in to unmask]
> Subject: Re: Grounding Question
>
> Perhaps I'm old-fashioned and possibly out of date Tom, but I would
> whack in that eight foot rod and tie everything in to it.
> pat, K9JAUAt 09:01 AM 6/25/2015, you wrote:
>> Hello, all.
>>
>>
>>
>> I know I'll get varying opinions on this, but I have a question about
>> station grounding out at the RV camp site.
>>
>>
>>
>> As many of you know, my main rig out there is my TS480, and I will be using
>> my trusty Alpha Delta DXCC multi-band dipole. When all is said and done,
>> I'm hoping the antenna will be up about 30 feet in the trees.
>>
>>
>>
>> Just as I did in previous years, I will have a ground connection running
>> from the ground screw on the TS480 to a terminal ground connection on the
>> back bumper of the RV. I use 10-gauge wire for this connection.
>>
>>
>>
>>
>>
>> Of course, I am very careful about disconnecting my antenna at any sign of
>> thunderstorms.
>>
>>
>>
>> Is this adequate, or should I be pursuing something additional?
>>
>>
>>
>> I wouldn't think a dipole would have to be grounded with a ground rod such
>> as is the case with a vertical, or a beam antenna on a tower, but my
>> theoretical knowledge in this area is a bit lacking.
>>
>>
>>
>> Thanks for any thoughts.
>>
>>
>>
>> Tom Behler: KB8TYJ
>>
>>
>
>
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