[Antennas] Butternut HF2V

[David Kelley]

George W5YR's note (copied below) is good advice. I would just add
that you could also use a 3-conductor cable with one conductor cut to
a 1/4 wavelength at 160 m, one cut for 80 m, and one cut for 40 m.
Alternatively, you could use three single wires cut to the right lengths
and zip-tie them together. This would put the feedpoint impedance close
to the theoretical 37 Ohms (plus ground resistance) on all three bands,
which in turn would make the inverted L easier to match with a matching
network located at the base of the antenna.  There is also usually less
power lost in a matching network when the input impedance of the
antenna is closer to the characteristic impedance of the cable feeding it.

73,
Dave NB4J

At 04:01 AM 10/28/2002 -0500, you wrote:
>Greg and Tom,
>
>Tom, I think that you left out "not" in your first sentence - and I agree
>completely.
>
>I would go a step further with the observation that if you have a 160-meter
>inverted L in the air, you already have an effective all-band radiator in
>place.
>
>Concentrate on installing an efficient multi-band tranmission line feed
>system with appropriate tuner(s) and enjoy all-band operation.
>
>The HF2V, like my HF9V, is in my opinion best installed on the ground with
>the most radials that you can find room far. It is usually more efficient
>to have more, shorter radials than fewer, longer radials. It is a good,
>though expensive, antenna but especially for good 80/40 performance, it
>demands a good radial field under it.
>
>But, if you already have an efficient inverted L on 160, you already have a
>good radial system in place and a vertical radiating element at least as
>high as the HF2V.

--
David F. Kelley, Ph.D.
Assistant Professor
Electrical Engineering Dept.
Bucknell University
Lewisburg, PA 17837
dkelley@bucknell.edu