I think it's just a matter of degree. The more RF chokes there are,
the less current will flow.

It would be a straightforward matter to add more wire to the model and
include loads for bypass caps and chokes.

In either case (wire inside or outside of the shield) good decoupling
where the wire lead exits is going to be important. The model so far
may suggest that being inside the shield is better than being
outside... but without that lead trailing away from the antenna some
distance, it's not time to conclude much about the relay+half square
problem.

The 40m coax monopole answer would seem to be "yes, there's current on
the center conductor, but it's small and coupled in through the ends"

If you're using the standard EZNEC, you're going to have to knock
another section off the top of the cage... if you've got EZNEC+ then
just add away...

I may try it when I get home... knock another section off and try a
control wire...

Might have to send off my money to Roy and go for EZNEC+... I know I
can get around segment limitations with other programs but I do like
EZNEC. This is probably the ninth time since I got the program a few
months ago that I've hit the segment limit ... i like meshing things...


Gives me a question about the (EZ)NEC limitations... should I be
watching out for fine 2D meshes? It seems to work OK in this case...
the base impedance of the meshed monopole and the current distribution
viewed on the segments all makes sense, and it seems to me that there's
not much reason to doubt that the currents are calculated correctly in
the mesh as long as it's not coarse with respect to a wavelength... any
caveats in this regard?



73,
Dan