[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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