I thought a Band Pass Filter at each station resolved that issue.
73
Bob, K4TAX
On 10/10/2019 5:27 PM, Ken G Kopp wrote:
Well-said, Don.
73!
Ken Kopp - K0PP
On Thu, Oct 10, 2019, 16:23 Don Wilhelm <[email protected]> wrote:
All this talk of multi-band antennas for Field Day ignores the problem
of multi-station Field Day operation.
There is sufficient pickup of one transmitter's energy on the antenna
being used by a receiver on another band.
For that reason, my club has banned the use of multiband antennas for
Field Day operation.
For a single station Field Day operation, the multiband antennas are great.
73,
Don W3FPR
On 10/10/2019 5:32 PM, David Lee / Seatools wrote:
On Thu, Oct 10, 2019 at 2:06 PM Fred Jensen <[email protected]> wrote:
Yes, however ... a center-fed dipole long enough to be moderately close
to a half-wave at 40 will develop a serious case of acute lobe-itis when
operated at higher frequencies, squirting your RF in a variety of
directions, many of which may not be productive for your intended
objective. Try, as many have over the years, to design the "magic
antenna" that is very small, provides a 1:1 match on all bands, easily
installed, and exhibits good gain, your effort will inevitably fail. As
JC Maxwell is reported to have said, "Physics is physics, the rules are
unbreakable." A log-periodic will give very modest gain over an octave
or more, however LP's hardly fall into the Field Antenna class. [:-)
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 10/10/2019 1:24 PM, Al Lorona wrote:
My experience with single vertical or sloping wires is exactly the same
as AB7E's. I have, over almost twice as many Field Days as Dave, come
to a
similar conclusion, with the slight difference being my preference for
an
"all-band dipole" fed with balanced line. This obviates the balun and
reduces feedline loss to negligible, so obviously I am maximizing
efficiency at the expense of any other possible advantage. (I can
usually
hear much better than I can be heard... so thus far this has been a
valid
decision.)
To sum up what I and what I think Dave are saying, you can't beat a
horizontal, center-fed wire up as high as you can get it. Its
simplicity,
the flexibility it gives you to QSY (with a good tuner), and its high
efficiency are almost unbeatable.
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