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Connect coax shield to pipe when dipole is at top of pipe?
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December 24th 05, 05:25 AM posted to rec.radio.amateur.antenna
Bill Turner
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Connect coax shield to pipe when dipole is at top of pipe?
ORIGINAL MESSAGE:
On 23 Dec 2005 20:29:01 -0600,
wrote:
The hamstick that is connected to the coax center wire
is always insulated from the pole, and the hamstick
that is connected to the coax shield could EITHER be
INSULATED or "GROUNDED" to the pole.
QUESTIONS: Which should it be? Should/Would it make any difference?
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What would be the point of "grounding" it to the pole? Do you want
some of your RF to flow into the pole and thereby have the pole
radiate? I wouldn't.
The HamSticks are your antenna. Don't add something else unless you
have a specific reason.
The 1:1 balun mentioned by someone else is a good idea. It will keep
all the RF in the antenna and prevent any from flowing on the outside
of the coax. If you choose to not use it, it's not a major deal but
that would distort the antenna pattern a small amount.
73, Bill W6WRT
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