[RFI] Attention 20m fans: Something New for Your Listening Pleasure - Maybe

[Cortland Richmond]

Interesting post. However, this appears to be little threat.  Power and
signal coupling by induction falls off very rapidly with distance. Note
that even with a "booster antenna" (probably a larger area loop on the
sensor) max operating range is 30 mm -- under 1¼ inches. And at 26.48 KB,
bandwidth will not be all that wide. One might be able to pick it up with a
portable SW receiver for a few feet.


Cortland

Dale, WA9ENA wrote:
> Other than the justifiable flood of BPL messages of late, I do recall some
> recent posts possibly involving medical equipment causing 20m
interference.
> As was indicated at that time, there is a designated ISM (Industrial,
> Scientific, Medical) band at 13.56 MHz.  If that equipment is well
designed