[RFI] Signal on 433.875

KD7JYK DM09 kd7jyk at earthlink.net
Sat Nov 17 02:21:19 EST 2012


: Had an intermittent signal that "apparently" has a digital component
: show up on 433.875.

Thats in an ISDM, Industrial Scientific Data and Medical, band.  The number
of devices you will hear around there is in the millions.

A few of the most common frequencies are 433.925, 434.000 and 434.500 MHz.
418.000 is another.  Even out here in BFE I can hear things for large
fractions of a mile from the nearest possible source.  One house about 3/4
of a mile from here has a constant carrier on 433.925.  I have not checked
to see if it is a malfunction or of there is a constant slow data stream
associated with it.

Kurt



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