My wife's computer is located about 20' below and almost immediately
under the fed end (via an Icom AH-4 autotuner) of my wire antenna. The
computer is connected via CAT5e cable to a Linksys 8-port switch.
When this cable was connected, I had S7 signals at various points on 20m
(and chokes -- three turns through a toroid -- at both ends made little
difference), so I decided to try shielding the cable by running it
through EMT.
I was surprised to find that grounding the EMT to the #4 Cu wire that
comes in from outside INcreases the level of these unwanted signals by 2
S-units. Any ideas why, and what I could do to get rid of this RFI
(until I get the tower up, at which time the feed point will be much
farther away from any of the computer equipment)?
Alan NV8A
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