A variation on the idea proposed by Wayne is to add an inductor or capacitor
in series with the center wire in the feeder. That will change the impedance
presented to the tuner. You may need to experiment a bit to find a value
that the ATU can match - as indicated by a low SWR - but you won't have
Kurt,
It all depends on the feedline length (in electrical wavelengths). If your
feedline is anywhere near a multiple of a half wavelength at 20 meters, that
behavior is not unusual. The T1 tuner (and most similar tuners) do not work
well if the impedance presented at the shack end of the feedli
Kurt:
Feed the same antenna with either 300 twin lead or 450 Ohm ladder line.
Connect a 4 to 1 balun at the shack end of the feed line, then connect the
other
end of the balun to the output terminal of the tuner. It will then tune and
radiate RF quite well!
73, Don
WA9TGT / Donnie Ga
That is just about the worst matching challenge you could try. At 20 meters
*each* side of the dipole is a half wave and presents a very high impedance
to the feedline. The actual impedance presented to the tuner depends on
feedline length and type of feedline so results are unpredictable.
Avoid to have odd multiple. A 40M antenna could be used on 15M, like the Alpha
Delta DX-CC, but not on 20M without high SWR.
On Tuesday, October 25, 2005, at 03:57PM, Kurt Loken <[EMAIL PROTECTED]> wrote:
>Hello All,
>
>I just got my SW-20+ working, and I ran into an
>antenna question. Current
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