"CD" wrote
My friend tried using a dummy load on a 300W transmitter. He was only
running it for a few mins at the VHF range, but he was picking up a
signal 100 ft away. Is that typical?
______________

If that 300 W was all radiated from a matched 1/2-wave dipole, it would
generate a free-space, maximum field of about 4 volts per meter at a
distance of 100 feet.

If the sum of cabinet, cable and dummy load radiation was 80 dB below that,
the maximum free-space field at 100 feet would be about 400 microvolts per
meter -- a very healthy signal.

RF