On 8/13/2025 9:37 AM, Steve Jones wrote:
Brian,
How about one vertical antenna on one RX and one horizontal antenna on a 2nd
RX, with the two signals combined in diversity mode? My K3 can do that.
73,
Steve
N6SJ
Steve, your comments are right on. After I sent my message, I was
thinking that maybe I should add something about using two antennas as
an alternative. I'm not familiar with the K3, but I know that several
current transceivers have two coherent receivers. You can either listen
to two signals, one in each ear, or combine them to maximize S/N, either
manually or automatically. The antennas don't have to be perfectly
orthogonal. Their polarization sensitivity just needs to be somewhat
different for automatic S/N maximization to work. You might even benefit
from location diversity if the antennas are far enough apart. The
distance needed may be a bit large on 160 though. What I like most about
using two antennas is that you aren't stuck with a suboptimal axial
ratio if you can't accurately determine your local ground constants.
Adjusting the combination to maximize S/N implicitly accounts for
whatever ground constants you happen to have. It also accounts for the
incoming elevation angle. I would use an automatic algorithm if possible.
Incidentally, I mistakenly sent my message to TowerTalk. I meant to send
it to TopBand. I later sent a copy there, but it hasn't shown up yet.
Brian
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