Signal on 28.635 MHz

[Mark Graalman WB8JKR]

 We (at work) had a problem with a complaint
from a ham hearing an S9 carrier on 144.190
to make a long story short, we tracked it down to
a Lexmark printer 300 feet from him in a
house two streets over. The printer was actually
turned off, but unless unplugged from its power
pack would generate the signal anyway.

Mark  WB8JKR


On Mon, 3 Jan 2005 18:16:56 -0800 Glen Zook <gzook at YAHOO.COM> writes:
> We had a signal on 144.200 MHz several years ago that
> turned out to be a "test oscillator" with a 2 inch
> antenna on one station's workbench.  I was hearing
> this about 7 miles away and the operator could barely
> hear it on a converter that he was working on!
> 
> This signal is covering at least a 10 mile radius and
> is definitely NOT a colorburst harmonic.  There are
> plenty of those around and they are at a much lower
> signal strength.  It is also definitely vertically
> polarized since the signal strength drops below that
> of the television spurs when any station goes to
> horizontal polarization.
> 
> The carrier did gain some modulation a while ago that
> consists of 2 frequencies.  One is constant and the
> other comes and goes.
> 
> It is the fact that this signal is so much stronger
> than the "normal" television spur and the fact that it
> "sounds" completely different that makes it unique.
> 
> Glen, K9STH
> 
> 
> --- "Gene A. Nailon" <k5dle at juno.com> wrote:
> 
> This went on for about 2 weeks as I recall.  We had a
> transmitter hunt to find the source of the carrier. 
> And we found it!!!   HIS OWN GRID DIP METER ON THE
> WORK> BENCH IN THE SHACK.
> 
> =====
> Glen, K9STH
> 
> Web sites
> 
> http://home.comcast.net/~k9sth
> http://home.comcast.net/~zcomco
> 
> 
>                 
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