In message , Walter Maxwell
writes
snip
Just try to imagine what you bloody 'ole Brits could have accomplished
around 1200 if you'd only had the tremendously high voltages achieved in the
near field of a CFA antenna to hurl at the enemy.

Walt

Excuse me for 'jumping in' here, it was difficult trying to locate a bit
of the thread that referred to the current title (CFA) I would like to
ask you learned chaps a question about the 'EH' antenna which I
appreciate is not the same as the CFA but its near enough for me:-)

I have built a couple of these and used them on 40m. Performance hasn't
been brilliant but they have worked and I was reasonably satisfied with
the contacts achieved considering the fact I used a barefoot K2 at
around 10 watts o/p and the antenna was sat on the shack bench connected
to the K2 by a 1 metre BNC to BNC cable laid across the bench. (I only
mention this last to try and forestall the inevitable comment that the
feeder does all the work)

All of this was done out of interest just to see if the antenna worked
at all, as my gut reaction was, and still is, sceptical regarding the
claims of its method of operation. I am not a mathematician, so the
various lengthy discussions regarding Maxwell's equations et al pass me
by; I am more interested in the practical aspects of this rather than
the theory. My question refers to the SWR bandwidth achieved using this
system. For an electrically very short antenna of this type I expected
something extremely sharp at resonance, perhaps in the order of 5 or 10
KHz between the 2:1 SWR points. In practice, the 2:1 SWR points are
some 100 KHz or so apart. When fed with 100 watts from an IC706, the
antenna itself does not get warm and neither does the short feeder so it
doesn't appear to be acting as a dummy load. Can someone satisfy my
curiosity and tell me (drawing comparisons with springs and dampers if
need be:-) how this is achieved.

Thanks,
Trev G3ZYY

--
Trevor Day
UKSMG #217
www.uksmg.org