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Old February 14th 14, 10:08 AM posted to rec.radio.amateur.antenna
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Default RV/Mobilehome RF gnd systems.

Does anyone have any novel ideas for RF grounds to use with an
RV/Mobilehome.

The antenna is vertical whip most times, about 7m. It is a modified fishing
pole with a wire up the centre and a 1m detachable whip. A 4mm ' banana'
plug is the feed point for a flying lead to the Auto -tuner, one of the SGC
range.

I generally use a counterpoise, or several, but having these laying around
campsites where non- amateurs may trip etc. concerns me.

The setup is only used when parked up.

I'm looking for 'out of the box' ideas, I can fit in a camping 'pitch' and
setup /tear down quickly.

--
73
Brian
G8OSN/W8OSN
www.g8osn.net
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Old February 14th 14, 10:24 AM posted to rec.radio.amateur.antenna,uk.radio.amateur
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Default RV/Mobilehome RF gnd systems.

"Brian Reay" wrote in message
...
Does anyone have any novel ideas for RF grounds to use with an
RV/Mobilehome.
The antenna is vertical whip most times, about 7m. It is a modified
fishing
pole with a wire up the centre and a 1m detachable whip. A 4mm ' banana'
plug is the feed point for a flying lead to the Auto -tuner, one of the
SGC
range.
I generally use a counterpoise, or several, but having these laying around
campsites where non- amateurs may trip etc. concerns me.
The setup is only used when parked up.
I'm looking for 'out of the box' ideas, I can fit in a camping 'pitch' and
setup /tear down quickly.


"if you understand the theory and maths and can do the calculations.
Easy enough for someone who knows his stuff."




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Old February 14th 14, 12:11 PM posted to rec.radio.amateur.antenna
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Default RV/Mobilehome RF gnd systems.

On Friday, February 14, 2014 4:08:58 AM UTC-6, Brian Reay wrote:
Does anyone have any novel ideas for RF grounds to use with an
RV/Mobilehome.


Why not use the vehicle for the counterpoise like mobile antennas do?
--
73, Cecil, w5dxp.com
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Old February 14th 14, 12:20 PM posted to uk.radio.amateur,rec.radio.amateur.antenna
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Default RV/Mobilehome RF gnd systems.

"W5DXP" wrote in message
...
On Friday, February 14, 2014 4:08:58 AM UTC-6, Brian Reay wrote:
Does anyone have any novel ideas for RF grounds to use with an
RV/Mobilehome.


Why not use the vehicle for the counterpoise like mobile antennas do?


That is the blindingly obvious answer, especially with a vehicle as large
as a motorhome.


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Old February 14th 14, 01:13 PM posted to uk.radio.amateur,rec.radio.amateur.antenna
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Default RV/Mobilehome RF gnd systems.

On Fri, 14 Feb 2014 12:20:08 -0000, "gareth"
wrote:

"W5DXP" wrote in message
...
On Friday, February 14, 2014 4:08:58 AM UTC-6, Brian Reay wrote:
Does anyone have any novel ideas for RF grounds to use with an
RV/Mobilehome.


Why not use the vehicle for the counterpoise like mobile antennas do?


That is the blindingly obvious answer, especially with a vehicle as large
as a motorhome.

Wrap it in tinfoil..simple!


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Old February 14th 14, 02:03 PM posted to rec.radio.amateur.antenna
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Default RV/Mobilehome RF gnd systems.

W5DXP wrote:
On Friday, February 14, 2014 4:08:58 AM UTC-6, Brian Reay wrote:
Does anyone have any novel ideas for RF grounds to use with an
RV/Mobilehome.


Why not use the vehicle for the counterpoise like mobile antennas do?
--
73, Cecil, w5dxp.com


Sorry, I should have said, the antenna is not mounted on the vehicle. I use
a small tripod. Running one coax shortish coax with a power lead taped to
it is fine but a long , or several long, counter poises are what concern
me.

73, Brian
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Old February 14th 14, 04:02 PM posted to rec.radio.amateur.antenna,uk.radio.amateur
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Default RV/Mobilehome RF gnd systems.

"Brian Reay" wrote in message
...
W5DXP wrote:
On Friday, February 14, 2014 4:08:58 AM UTC-6, Brian Reay wrote:
Does anyone have any novel ideas for RF grounds to use with an
RV/Mobilehome.


Why not use the vehicle for the counterpoise like mobile antennas do?
--
73, Cecil, w5dxp.com


Sorry, I should have said, the antenna is not mounted on the vehicle. I
use
a small tripod. Running one coax shortish coax with a power lead taped to
it is fine but a long , or several long, counter poises are what concern
me.


Then run a "shortish" earth braid from the vehicle's chassis to the antenna.

It really is not rocket science.


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Old March 3rd 14, 03:54 AM
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Default

You are confusing earth ground with a counter poise..

To establish a counter-poise, the counter-poise needs to be directly beneath the antenna.

Just hooking some braid to the antenna won't do anything.

RF needs lots of MASS - a piece of copper braid does not do this.

Furthermore - a piece of wire 9 feet long would detune the antenna system - since 9 feet is a perfect dipole for 6 meters...

I do not think that the OP is sincere in wanting to do anything since his expectations are unrealistic.

The proper thing to do would be to either fabricate a mount that places the antenna directly on the vehicle, or fabricate a mount that goes beneath the tire that tilts and holds the antenna above the vehicle..

I'm not going to comment about women or the fact that most men's problems revolves around their women not allowing them to do things like this. Sometimes a man needs to grow a set of balls and do what is mechanically / electrically correct as opposed to being politically correct...
__________________
No Kings, no queens, no jacks, no long talking washer women...
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Old February 15th 14, 11:12 PM posted to rec.radio.amateur.antenna,uk.radio.amateur
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Default RV/Mobilehome RF gnd systems.

"Fred Roberts" wrote in message
...
On Fri, 14 Feb 2014 16:02:40 -0000, "gareth"
wrote:

It really is not rocket science.


Especially for a seasoned LW tamer.


LW? Que?


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Old February 15th 14, 11:21 PM posted to rec.radio.amateur.antenna,uk.radio.amateur
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Default RV/Mobilehome RF gnd systems.


"Fred Roberts" wrote in message
...
On Sat, 15 Feb 2014 23:12:46 -0000, "gareth"
wrote:

Especially for a seasoned LW tamer.


LW? Que?


Long wire. Gawd he's been banging on about it for weeks now, shirley
you noticed - tales of daring do with a homemade auto ATU interspaced
with yarns about a sporting injury? Did someone mention Walter Mitty?


Of course. For some reason I had taken that to be a reference to a Lyin'
Tamer




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