GB> Carrier on 28.635 MHz

peter A markavage pmarkavage at JUNO.COM
Tue Jan 4 02:42:09 EST 2005

Somebody in your area put in the wrong type of  "6146" and it's
oscillating on that fequency.

Pete, wa2cwa

On Mon, 3 Jan 2005 14:40:59 -0800 (PST) Glen Zook <gzook at>
> Last night I was checking a local's SSB signal on the
> 10 meter band.  After we got through I started tuning
> around the band and ran across a steady carrier
> located approximately at 28.635 MHz.  Although there
> are numerous computer "spurs" around that frequency
> this particular signal is very different from the
> "normal" computer spurs.
> First of all, there is no modulation of any type on
> the carrier, not even a trace of "hum".  There are
> computer spurs on almost the same frequency but the
> signal strength of those is such that an S-1 signal
> could be easily copied through the spurs.  The signal
> is definitely vertically polarized.  When I switch
> from a vertical antenna to my 3-element yagi at 55
> feet above ground the carrier virtually disappears in
> signal strength and the computer spurs take over the
> frequency!
> I have checked with "locals" and they are hearing the
> same signal again vertically polarized.  I first came
> across the signal about 11:00 PM CST last night and it
> was as close to 28.635 MHz as I could read on all 3 of
> my Collins S-Line receivers and my Collins 75A4. 
> Since last night the signal has drifted up in
> frequency almost 1 KHz and is now on about 28.636 MHz.
> Since I haven't tuned around that part of the 10 meter
> band for months I have no idea as to how long the
> signal has been on the air.  But, the signal level is
> running around S-8 on receivers that have been
> calibrated for an S-9 reading of 50 microvolts. 
> Because of the fact that the signal level does not
> seem to vary this source has to be local.
> I have heard from several people around the country
> that are hearing signals on 28.635 MHz.  However, all
> of those seem to be the "usual" computer "spurs" since
> they do have some sort of modulation ("buzz", etc.).
> Anyway, I haven't put my 10 meter mobile in the car
> and gone looking for the source of the signal. 
> However, I am looking for suggestions as to just what
> this might be.  Frankly, over the years I have run
> into all sorts of signal sources.  But, none as
> "clean" as this particular source.
> Glen, K9STH

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