Topband: Detuning Vertical
Michael Rauh
mikerauh at ameritech.net
Sun Oct 15 16:15:49 EDT 2006
--- K9AY <k9ay at k9ay.com> wrote:
"a grounded half wave (which is what your 160 vertical is on 80M) is about as
well detuned as you'll get."
Gary, Thank you and others who responded. I modeled some more, testing a
resonant trap and base loading. Base loading made things worse, and the trap
only gave 3 dB improvement in current suppression, not worth the trouble in my
view. I think your observation is correct, a grounded half-wave is already
about as detuned as I can get.
I envision using a relay to ground the 160M antenna when I am using the 80M
antenna. When I am on 160, a second relay can open-circuit the 160M antenna
during receive periods while I am listening on my RX antenna - a K9AY loop, of
course!
73,
Mike W8GT
"When you're a Ham, you're a Ham all the way"
- Apologies to Steven Sondhiem
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