[Antennas] Only dumb question is the one not asked
Mike J Maloney
[email protected]
2002年3月29日 22:27:34 -0600
Would not a transformer on a monopole be more for the purpose of
impedance matching than as a choke?
I can envision certain lengths(like 1/4 wave) of coax giving more
problems with unbalanced current than others without a balun. I can
sure tell a difference with a coax balun on my tribander yagi that
permits me to bond or "ground" the driven element to the boom and mast
rather than to leave them floating up in the air.
Mike, AC5P
On 2002年3月29日 18:30:27 -0800 Dan Richardson <[email protected]>
writes:
> At 05:26 PM 3/29/2002 -0800, you wrote:
> >At 06:41 PM 2002年03月29日 -0600, [email protected] wrote:
> >>RF current flowing on the outside of a coaxial feedline is
> >>not a normal situation. It is caused by an abnormal
> >>condition. You get that by connecting a balanced antenna
> >>(dipole) to an unbalanced feed line (coax).
>>> Huh? Then why is that RF chokes (baluns if you like) are used on
> monopoles?
> The fact that an antenna is balanced or not does not remove the need
> for
> stopping the unwanted current from flowing on the outer shield of
> coax.
>> Danny, K6MHE
>>> - - -
>> Your moderator for this list is:
> Larry Wilson KE1HZ [email protected]
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