I say, I say, I say! Did you hear the one about the ground plane
and the policeman's dog?

Perhaps not.

wrote in message
oups.com...
Does a ground plane need a choke?

DOes a ground plane need a choke?
 

Does a ground plane need a choke? What about being grounded to the mast?

If the engine is already warmed up, no choke is needed.

"Airy R.Bean" wrote in message
...
I say, I say, I say! Did you hear the one about the ground plane
and the policeman's dog?

Perhaps not.

wrote in message
oups.com...
Does a ground plane need a choke?

No and no. But in other cases, it could be yes and yes.
This should keep you good and confused for a while...:/ MK

I cleaned and ground my plane after it struck a nail and
was also choked with sawdust.

wrote in message
oups.com...
No and no. But in other cases, it could be yes and yes.
This should keep you good and confused for a while...:/ MK

wrote in message
oups.com...
No and no. But in other cases, it could be yes and yes.
This should keep you good and confused for a while...:/ MK


And may I suggest that Stryped pick up a copy of

ARRL antenna handbook
ARRL novice antenna notebook
ARRL "hints and kinks for the radio amateur"
VHF UHF manual by Jessop

KE6LZS

Lou

A "ground plane" antenna is designed to 'fool" the antenna into thinking the
horizontal radials are actually the surface of the earth. This term actually
has nothing to do with grounding the antenna. However, the antenna will work
better if the mast of it is grounded, since this gives the radials an actual
earth ground reference electrically, and it therefore will work more closely
to it's design specs.

wrote in message
oups.com...
Does a ground plane need a choke? What about being grounded to the mast?

Zombie Wolf wrote:
A "ground plane" antenna is designed to 'fool" the antenna into thinking the
horizontal radials are actually the surface of the earth. This term actually
has nothing to do with grounding the antenna. However, the antenna will work
better if the mast of it is grounded, since this gives the radials an actual
earth ground reference electrically, and it therefore will work more closely
to it's design specs.

Why would RF currents flowing in the mast make the
antenna work better? Wouldn't that be about the
same as common-mode transmission line currents?
--
73, Cecil http://www.qsl.net/w5dxp


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A ground plane or a tuned counterpoise does not. A rule of thumb is that if the
conventional aperture is 1/2 wave across or more, you won't need the choke.
Smaller and you will.

73,
Chip N1IR

On 12 Jan 2005 17:25:52 GMT, (Fractenna) wrote:

A ground plane or a tuned counterpoise does not. A rule of thumb is that if the
conventional aperture is 1/2 wave across or more, you won't need the choke.
Smaller and you will.


Any antenna feed with a coax transmission line will benifit from using
a choke/balun at the antenna feed point. It is just good engineering
practice to do so. It won't hurt and only can help.

Danny, K6MHE

oh god. here we go again. I didn't SAY that "RF flows into the antenna
mast". Read the post again.

"Cecil Moore" wrote in message
...
Zombie Wolf wrote:
A "ground plane" antenna is designed to 'fool" the antenna into thinking
the
horizontal radials are actually the surface of the earth. This term
actually
has nothing to do with grounding the antenna. However, the antenna will
work
better if the mast of it is grounded, since this gives the radials an
actual
earth ground reference electrically, and it therefore will work more
closely
to it's design specs.

Why would RF currents flowing in the mast make the
antenna work better? Wouldn't that be about the
same as common-mode transmission line currents?
--
73, Cecil http://www.qsl.net/w5dxp


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News==----
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Newsgroups
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Zombie Wolf wrote:
oh god. here we go again. I didn't SAY that "RF flows into the antenna
mast". Read the post again.

Please rethink your position. If no RF current flows in the mast, a
fiberglas mast is just as good as a metal mast. If you are depending
upon the mast to furnish a ground, RF current *must* be flowing in the
mast. Otherwise, how do you know it is providing a ground? You simply
cannot have it both ways. I hope that soaks in.
--
73, Cecil http://www.qsl.net/w5dxp


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