3 ms·
A legal unlicensed FM transmitter could possibly cover a small area as described. If it's line-of-sight on a frequency with no interference and stays at the le
by RF_Enthusiast 4y ago
A legal unlicensed FM transmitter could possibly cover a small area as described.
If it's line-of-sight on a frequency with no interference and stays at the legal limit of 250 microvolts per meter measured at 3 meters, and there's a good receiver with a good antenna, it's possible.