[Elecraft] Coax-Fed Antenna for KX1 with ATU
Phil Wheeler
[email protected]
Sun Dec 21 18:56:06 2003
Vic,
I sometimes use "parallel" dipoles (N2CX) in the field. But I keep the
legs as far apart as possible. In this case, support considerations are
difficult.
However, my decision was just made for me -- at least the first thing I
will try. Just got down my "antenna supplies" box from a shelf in the
garage and found an unused 51 ft G5RV. I will install that (center on
the roof tower supporting my beam) and give it a try tomorrow.
Likely not the best theoretical solution, but definitely the most pragmatic!
73, Phil
Vic Rosenthal wrote:
> Phil Wheeler wrote:
>
>>
>> My experience with parallel dipoles has not been real good,
>> though.
>
>
> The secret of parallel dipoles is to keep some separation between the
> ends. If you are hanging them all in the same plane (i.e., from two
> supports), you can allow the last couple of feet of each dipole hang
> straight down, for example. Using ribbon cable without separtating
> the ends is not good.
>
> If you want to tune them, tune the longest one first, since the short
> ones are affected more by the long ones than vice versa. And,
> although this doesn't apply to the KX1, I should mention that if you
> have a 40-meter dipole you should not also add a 15-meter one (the 40m
> antenna will also show a low impedance on 15).
>
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