Below is a link to a short audio recording of the daytime, groundwave signal from a 530 kHz TIS station located about 35 miles away from me.
If this TIS station exactly meets its spec for a 2 mV/m field at a 1.5 km radius from their transmit antenna, then for the 15 mS/m Earth conductivity existing for this path they would have a field of about 37 µV/m at my receive location.
The receiver used was a battery-powered Sangean PR-D15 with an internal loopstick antenna about 8" in length, operating in the back yard of my home.
Not much fun to listen to, but does show about the extreme limit for receiving and identifying a weak, daytime groundwave signal in the medium wave band.
nofile.io/f/9bOB9qTh5G6/Mark+Twain+Lake+TIS.mp3
If this TIS station exactly meets its spec for a 2 mV/m field at a 1.5 km radius from their transmit antenna, then for the 15 mS/m Earth conductivity existing for this path they would have a field of about 37 µV/m at my receive location.
The receiver used was a battery-powered Sangean PR-D15 with an internal loopstick antenna about 8" in length, operating in the back yard of my home.
Not much fun to listen to, but does show about the extreme limit for receiving and identifying a weak, daytime groundwave signal in the medium wave band.
nofile.io/f/9bOB9qTh5G6/Mark+Twain+Lake+TIS.mp3