On Wed, 20 Jun 2007 09:26:17 -0700, Leon
wrote:

We had to use double-screened cables
for some measurements, there was too much leakage from standard coax.

The term for this is Tri-axial cable. Often each end of the braid is
left open but each connector has one braid. In other words, there is
no braid to braid connection, and there is no shell to shell
connection. The braids overlap.

It is very simple to violate shielding through the wrong sequence of
groundings from the source to the load. The art of shielding is
actually found in the practice of finding your reference (ground).

73's
Richard Clark, KB7QHC