[TowerTalk] Shields

[Tom Rauch]

> I'm sure you know the difference between balanced and
unbalanced
> feedlines.
>
> But..if the shield is no matter, how about taking that
RG8X and
> stripping all that unneeded copper braid off completely?
I'm guessing
> the manufacturers of coax sell a LOT more of the stuff
with a braid on
> it, and I'm still pretty sure there is a reason for it.

The point is if currents are equal and opposite and
conductors are close, a line certainly doesn't radiate very
much.

The vast majority of problems at HF are caused by unequal
currents entering and exiting the center and shield at each
end.

It's ironic to see how much we worry about insignificant
issues, while pooing real problems. I'd wager the bulk of
people who think multiple shields do something meaningful
also think a groundplane with four radials can be fed with
coax without significant common mode currents appearing on
the feedline.

Anyway enough of this. It's cutting into my Star Trek time.
I need to see some real shields in action.

73 Tom