On Mon,7/18/2016 6:26 PM, Ken G Kopp wrote: > One set is immediately beside my KPA500 with no interference. That's meaningless, Ken. RF is radiated by antennas, not shielded boxes. :) The most severe RFI to/from my shack is when I'm using a 160M Tee vertical 20 ft from my operating desk. 73, Jim K9YC