On May 6, 11:36*am, Jim Lux wrote:
What if you use a coax with two shields, one shield for chassis ground
which is the coax connection and the outer shield for earth/ground?
Yes, there could be a ground loop but the nearest ground to a strike/
antenna is probably the best protection

You'll still need to deal with RF currents flowing on the outside of the
coax (and also potentially between inner and outer shields).

A good transient suppression scheme at the entry point deals with the
overvoltages from lightning, power lines falling on your antenna, etc.

The challenge is in protecting a sensitive receiver front end, while not
introducing other problems: *if the receiver burns out at 1Volt, a clamp
at 300V isn't going to save the front end, although it will keep the
radio from catching on fire. *A diode clamp to the supply rails or
similar will save the front end, but will almost certainly result in IMD
issues with strong input signals. *Sometimes, the front end just has to
be the sacrificial "fuse", so you want to make sure that it's a cheap &
replaceable part that suffers.

Let me try again and put it another way. What if:
The transmission line is a two parallel wire system.This is enclosed
in one sided metalized mylar isolated shielding Total covered with
insulation and wire netting for true ground ? All of the above buried
in ground