Thanks Jim, I should have added the part about trying multiple turns of
cable around the ferrite.
Granted that Radio Shack's parts supply is meager at best, is there
someone who has taken on the supplier role Amidon used to offer for hams?
Most hams won't have a real electronics wholesale company nearby any
more, even before the Shack went away from components to mostly phones.
One of the staples for general sniffing here is a one inch diameter coil
on a form with both ends brought to a coax with scope end connector.
The coil wound with 2 inches of enameled wire, which is enough to pick
up near a cable and let you see on a scope if a shielded cable leaks
signals that cause problems.
This came out of a bulletin put out for years by Perfection Mica Corp.
maker of Mu Metal cans and boxes and different foil shielding materials.
Their shielding tape allowed us to create a shielded attache case for
transporting recorded digital VHS tapes used in a proprietary recording
system for ocean acoustics noise. The case inside was lined with the
stick on tape as a mu metal shield.
-Stuart
K5KVH
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