[Elecraft] "Quick & Dirty" Antenna?

[Ron D' Eau Claire]

> Since you have the antenna tuner already, I would vote for an end fed 1/2
> wave wire. By being 1/2 wave long you eliminate the need for an
> extensive ground system.
>
> I have details of the one that I use with my K1 on my web page at
> http://www.io.com/~nielw/qrp2/lunchbag.htm
>
> 73, Niel - W0VLZ
>

Nice package, Niel!

I agree with you about 1/2 wave (or a multiple of 1/2 wavelength) being a
great length to use for an end-fed wire if you have the room for it - UNLESS
you get too close to exactly an electrical 1/2 wavelength long! If you do
the ATU won't find a match. The impedances right at the voltage peak are too
high for it.

Don't throw out the idea, Kirby, if that happens to you. Just add or
subtract a few feet- the impedance changes quickly near 1/2 wavelength long.

Niel's plan puts the highest radiation portion (the current loop) a full 1/4
wavelength from the rig (and hopefully up in the clear) and produces the
least ground losses because of the high impedance at the rig end of the
wire.

You do need a 1/4 wave counterpoise wire or some other r-f ground, just the
same, or your rig is likely to be "hot" with r-f.

Ron AC7AC
K2 # 1289