http://elecraft.85.s1.nabble.com/KX2-Antenna-Curiosity-tp7655612p7655654.html
> I have a KX3 instead of a KX2, but I frequently go out in the field to play
> radio at local parks and other scenic spots. I have a number of antennas,
> but one of my favorites is one I built recently, a link dipole for 40, 30,
> and 20. It's tuned for the CW portions of the bands, so it doesn't need
> much tuning, but if I want to work phone I hit the internal tuner just to
> tweak it a little bit. I suspend it on top of a 20-foot telescopic
> fiberglass pole from SOTABeams, secured in a drive-on mount and held down
> by one of the tires of my E-150 conversion van. I run it in inverted-V
> configuration, using stakes or photographers' sandbags at the far ends if
> the location doesn't like stakes.
>
> I didn't bother with baluns or anything. I just wired the coax to the
> midpoint and trimmed it up that way using an analyzer. I get good results
> with it on CW or phone, easily going from the Philadelphia suburbs to the
> Michigan Upper Penninsula on 40m phone with 10 watts. If I find that I'm
> getting stray RF, I have a big isolator choke I can run the line through
> that clobbers it nicely.
>
> 73,
> Gwen, NG3P
>
> On Fri, Oct 11, 2019 at 6:55 AM CUTTER DAVID via Elecraft <
>
[hidden email]> wrote:
>
> > I'd like to suggest that one very good reason for using centre-fed and
> > external matching unit is because the harmonic pickup from nearby
> stations
> > is much reduced compared to multi-band antennas. This is best
> implemented
> > when the antenna is as near perfectly balanced as possible to avoid
> > feedline pickup. A *proper* choke to cancel out-of-balance currents
> should
> > be helpful in this regard.
> >
> > For single station field days, I've used the Spiderbeam 807
> off-centre-fed
> > inverted V dipole on a f/g pole which is a fast way to get on air without
> > an external matching unit to fiddle with. Common mode current is
> virtually
> > zero. It's a great solution for beginners reducing the fiddle factor, ie
> > plug and play KISS. Less to carry out into the field as well.
> >
> > David G3UNA/G6CP
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