On Sep 17, 9:41*pm, "Frank" wrote:
I know books say a lot of things but do they explain WHY current
cannot flow thru the center?
Somebody said the current flow backwards now that is hard to
understand unles he is refering to a tank circuit
where the antenna has capacitance at one end and inductance at the
other and the current goes nowhere.
I think I will sit back and see what the experts say and if the IEEE
has accepted al these explanations.

As mentioned before; in particular reference [9a] of:http://www.g3ynh.info:80/zdocs/comps/refs.html
Ramo, et. al was published in 1965. *The methods of computation
for cylindrical conductors has been known for some time.

One thing I particularly have difficulty with is that the secondary
current can overcome the primary current

Note the central current flow is significantly less than
the surface current.

where the power flows back to a wall plug or something like that.
Another infers that current travel in a aluminum tube is different to
the flow of a solid conductor presumably with double the surface area
you have double the amount of radiation.

As in a charged sphere the net internal field is zero.

The next publication from the
ARRL is going to rock the science world with these findings on
radiation. Funny thing is that based on my findings I designed an
antenna which computer program AO Pro
determined was quite good, an arrangement that is *if the program
doesn;'t follow the teachings of the books should I then throw the
program away?

I am not familiar with AO Pro, but usually NEC based programs
will compute an average gain test, which helps determine the
validity of the model. *Pushing the limits of the program concerning
conductor proximity, length to diameter ratio, etc. can produce
erroneous results.

NEC4 models the antenna that is in equilibrium also isn't that a
bummer?

NEC 4, and 2, for that matter, *use a "Thin wire approximation" which
assumes current only exists at the surface of the wire, has only axial
components, and the surface current is uniform around the wire.

If only somebody would come up with a vector diagram of a
radiator that was NOT in equilibrium
I could locate my fault very
quickly.

I am not sure what you mean by a "Vector diagram".

Still if all of what has been described will be published in
the ARRL and IEEE papers I can afford to wait.
Thank you all
Art

Frank

A vector diagram that shows a charge at rest on the surface of a
radiator which shows that there is no opposing vector at the center.
Then we have a radiator that is not in equilibrium. In that case i
would place a vector on the surface and another vector at the center.
Thus charges are in motion both on the outside and the inside of the
radiator.I base this on the reasoning that the inner resistance is
less
than 377 where an arc is produced at the ends. the idea that the
leading edge of current flow will reverse at the radiator ends and
oppose the trailing current is just beyond my thinking as you do not
have a closed circuit. I have not seen an illustration that shows
current that reverses upon itself in a open circuit.
Regards
Art