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RE: [RFI] Attention 20m fans: Something New for Your ListeningPleasure -

To: rfi@contesting.com, dgsvetan@rockwellcollins.com
Subject: RE: [RFI] Attention 20m fans: Something New for Your ListeningPleasure - Maybe
From: "Cortland Richmond" <ka5s@earthlink.net>
Reply-to: ka5s@earthlink.net
Date: Tue, 26 Aug 2003 7:10:17 -0700
List-post: <mailto:rfi@contesting.com>
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



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