Feed line losses maybe, but total system loss will probably be
overwhelming.
Or at least to someone like me who likes to actually radiate most of
the
power I feed to an antenna.
The feed losses feeding a dummy load at 1.8 mhz are likely to be
quite
low also.
Doesn't mean I would want to use it as an antenna though.
In one of his posts, he even goes as far as to claim appx 9 dbi gain
from his very small vs wavelength device.
This is appx equal to the gain of a FULL SIZE 3 element NBS yagi.
The only thing I keep observing here is a full load of horse hockey
that keeps emanating from a certain delirious old fart now living in
Illinois.
9dbi gain on 160m with a radiator the size of two shoe boxes,
consisting
of loads of wound 22 gauge wire. I don't know how many feet, but
probably in the hundreds anyway.. Can we spell some serious loss?
In some posts he seems to infer that he is now winding it on some
plastic barrel or garbage can, but I wouldn't expect a drastic
increase
in performance, considering the frequency being used.
I won't mention that in other breaths he takes, he claims no real
gain, but basically an omnidirectional antenna.
The wind changes direction depending who he wants to listen.
This is some good stuff. The comedy channel is missing the boat.
Heck, the feeder losses are really not much of an issue being
at 1.8 mhz, the loss of most any decent coax is very low.
Nearly ladder line performance.. You could be 10/1 SWR and
it wouldn't kill you as long as the radio didn't shut down.
In his case, the coax probably radiates more than the antenna.
His antenna is not a whole lot different than someone using an
Isotron. And in the case of that small antenna, it's not unusual for
the coax cable to do a good bulk of the actual radiating.
At least the people that make the Isotron have the common
decency not to proclaim some miraculous discovery of science,
and/or claim 9 dbi gain from their dinky antenna on 1.8 mhz.
So I don't heckle them like I do Art.
If Art did likewise, he'd never hear a peep out of me.
But we all know Art is not going to follow that plan... :/

Feedline loss is what I was considering. As for the ultra
compact antenna losses are likely to be very high. The
problem with such structures is that they are impossible
to model accurately with any NEC based program.

73, Frank