All I can say walter is that 4KW+ is heading towards the aerial and didly squat is being reflected back so 4KW must be going somewhere. Ive seen the meters with my own eyes. A good point of reference in the TSA is this SDR http://norfolk.george-smart.co.uk:8073/
Gives -35.5 dBm when RC is running 4kW. from the Harris DX25U
Somewhat less when on the Nautel.
All the best, STx