Using a standard automobile AM receiver I have been able to detect broadcast signal dead-zones and hot-zones. Close to the transmitter an ordinary clock radio is used to confirm a transmitter signal.
At the moment only a wire antenna is attached to the SSTRAN AMT 3000 transmitter. Does not appear the signal goes more than 200 feet. Best reception thus far is 75 feet or less.
This is a dense, urban area.
I was able to detect a faint signal about 600 feet from the antenna.