Alright, so I eliminated the 3’ cable and connected the radio to the dummy load using just an SMA to UHF adapter. I performed another test. This time I experienced full quieting reception out to about 300’, reliable reception with variable noise out to about 600’ and the complete loss of reception at about 975’. So it would seem the cable is definitely a contributor (perhaps 6dB more), but not the only one. That leaves us only two components. The radio itself and the dummy load. It would seem therefore it would take a faraday cage around one and then the other to determine which of these two ends up being the bigger radiator. One significant take away from this exercise is the knowledge that just because one is using a dummy load it should not be assumed that one is not transmitting a signal, but instead only that ones transmission range is being substantially reduced compared to a purposeful antenna. So, if a dummy load were being used say in a large apartment building or condo complex, the radio signal may still very well permeate the entire complex or even beyond. Also, as has been reported by me in other testing I have done, I experience very high propagation loss around me. Those without the dense stands of trees and other obstacles I have may very well see their signal travel much further. Thanks for all your input. Michael WRHS965 KE8PLM