On Jul 4, 3:13 pm, John Smith wrote:
Art Unwin wrote:

...

rest of bull snipped... enough for today, i'm going to enjoy some nice old
scotch and enjoy the rest of the holiday.

Woww, you have slipped back into the abyss again. Statics and
radiation do not mix!
Have a happy Guy Faukes day with the fireworks
Art

Methinks that may have already been the scotch ... ;-)

Anyway, my "1/2 wave" omini-vertical is a "full wave antenna!"

180 degrees of the rf wave, proper, is in the radiator--180 degrees is
in the counterpoise (mirrored, of course--or, 180 degrees out of phase
with the radiator (and, of course, is a radiator itself.) This is
mostly due to the current unun/choke at the base of the radiator, on the
coax. Else it does have a tendency to attempt to use the coax as a
counterpoise ...

Anyway ... yawn ... a full wave is being supported in the antenna
hardware proper.

Regards,
JS

A good way of looking at it for the layman since dividing a full wave
radiation by two you get close to the correct answer except for a
couple of ohms. But even that falls down with respect to a horizontal
dipole which is not in equilibrium and thus corrona can form at the
ends. With a quad antenna it then be comes in equilibrium where
Maxwells laws apply without chinanigans. Remember ground plains are
nothing but resisters carrying current and do not radiate because of
zero skin depth. The FCC covers this with broadcasters b y limiting
the level of ground plain resistance to I think about 2 ohms to cut
down non radiative losses.
All very fascinating stuff because the total circuit is then of a
parallel circuit nature with the inclusion of a dampening resister.
Cheers
Art