In message , Reg
Edwards writes
Trev,
As Cecil says, a wider than expected bandwidth in an antenna of given
size, is an absolutely sure sign of greater loss somewhere in the
wideband antenna system.
Unless one knows how the thing is supposed to work, which with EH and
CFA is not very likely, there's no indication of where the loss may be
except from a visual examination. If there are any coils of
relatively thin wire, either in the antenna or tuner/phaser, then
that's a good pointer.
But experimenting to improve the bandwidth*efficiency product, one way
or the other, will not get you very far. As one goes up the other is
sure to go down. It's not difficult to guess which you would prefer.
A magloop. with a single turn coil of copper pipe at the lower
frequencies, is far and away the most narrow banded and therefore the
most efficient of all the small antennas. Furthermore it has a
built-in, equally very low loss tuner.
----
Reg.
Thanks for your time Reg,
I drafted a lengthy response to your note above a little earlier but
binned it in favour of this :-) I suppose my problem is that I would
dearly like to believe the claims for the EH et al but my head tells me
that it can't be so. I have had a lot of fun 'playing' with the idea and
I suppose I should be happy with that.
Trev
--
Trevor Day
UKSMG #217
www.uksmg.org