It's hard to believe the marine version of the Outbacker was very
efficient, but it probably was better than nothing at all.

Yeah, other than traps, the only other reliable technique I can think of
for a multiband (as opposed to simply a "wideband") antenna is to use
switched, tuned feeders (open wire line stubs actually, cut to tune a
dipole to each band). I have a difficult time imagining that on a
sailboat! Anyway, that stretches the idea of "no tuner", but at least
there are no moving parts other than the band switch.

Well, now that I think of it, there are some common antennas that work
on more than one band without a tuner or traps. A simple 40 meter dipole
(or quarter-wave vertical) ought to work on 15 meters, for example. And
the G5RV, and some sky loop antennas are multiband. A vertical (cut the
horizontal one in half) G5RV would be interesting to consider. I don't
think I've encountered that before and matching might be interesting,
but it may have potential for backstay antennas. These antennas usually
benefit from a rig with a built-in tuner, so maybe they should be
"disqualified" as not tuner-less.

Chuck, NT3G
s/v Sans Serif

Doug Dotson wrote:
I supose that one could make a trap-vertical to avoid a tuner, but
I've never seen one for marine bands. I do recall a version of the
OutBacker that was for marine use but have never known anyone
that had one.

Doug, k3qt
s/v Callista