I am trying to track down a source of inter-station interference between
my two radios when using them for SO2R contest operation.
My SO2R antenna switching system is located at the tower base. Two
TopTen 6-way relay boxes are mounted on an aluminum plate, as well as 6
minibox-enclosed A/B relays. The plate is grounded to my tower ground
by a short, direct #2 copper wire.
The TopTen boxes are bolted to the plate. The Miniboxes are mounted to
it with a pair of metal tapping screws each.
I did not use Noalox between any of these enclosures during
construction. My question -- can I rely on the bolts and metal tapping
screws to make a good connection between the shielding boxes and the
aluminum plate? In terms of RF shielding, how important is it to have
the shield boxes well connected to a common ground? Would it likely be
worthwhile to disassemble everything and apply Noalox? Alternatively,
should I figure out how to run some sort of dedicated grounding
conductor among the boxes and down to the tower ground?
TIA
--
73, Pete N4ZR
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