I don't remember the article, Charlie, but that's a fabulous idea, and at
first blush it doesn't sound all that hard to implement. One way might be to
set up three receivers at different locations, each with a 10 MHz GPS or
rubidium time base (both inexpensive and readily available.). For each
receiver, a simple frequency divider could produce a pulse every 100
milliseconds from the time base. The pulse would trigger a frequency
counter, which would then count the elapsed time from the ttrigger pulse
until the DQRM signal started transmitting (or stopped transmitting -
doesn't matter which). Once the differences in elapsed times were known
between the three receivers, the DQRM signal could be accurately
triangulated. Sounds ike a fun project. Sure wish we'd had something like
that for the Navassa DQRM jerks.
73,
Jim W8ZR
> -----Original Message-----
> From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of
n0tt1@juno.com
> Sent: Sunday, February 08, 2015 12:18 PM
> To: topband@contesting.com
> Subject: Re: Topband: K1N DQRM Tracking Project
>
> IIRC, quite some years ago, QST had a photo & description of
> a FCC "signal locator" (for lack of a better description) consisting
> of several remote receivers that were linked together.
>
> Anyway, these could instantly locate the origin of a
> skywave signal with a resolution of a city block(!!) using a
> precise timing equipment/technique.
>
> I looked for the article using the ARRL's periodical search...no luck.
> Does anyone remember reading/seeing that article...perhaps in the
> "Strays" column of QST?
>
> Charlie, N0TT
>
> On Sat, 7 Feb 2015 17:05:04 -0600 "Doug Renwick" <ve5ra@sasktel.net>
> writes:
> > Is anyone using this DQRM Tracking Project report? They want reports
> > of
> > deliberate QRM like 'tuner uppers' and other types, but not QRMers
> > like cops
> > or 'no splitters'. I don't know how accurate they can be to
> > identify the
> > guilty station on any band especially 160m with or without a
> > directional
> > antenna.
> > See below:
> >
> >
> > THE DQRM TRACKING PROJECT ---> Recently, the amount and intensity
> > of DQRM
> > (Deliberate QRM) has been growing logarithmically, targeting
> > DXpeditions
> > all over the world. DQRMers attempt to spoil communications and
> > disrupt the
> > joy of chasing DX. Without going into the motivation of DQRMers,
> > the DX
> > Community is taking steps to eliminate this practice.
> > The KP1-5 Project, which is producing the 2015 K1N Navassa
> > DXpedition, has
> > been working with tele-communications agencies around the
> > world. The
> > objective is to identify stations who are acting as DQRMers and
> > use legal
> > means to stop this behaviour. The technology is in hand to
> > solve this
> > problem and, with your assistance, we can stop this blight that is
> > hurting
> > hams worldwide.
> > HOW IT WORKS: Locating the stations engaging in DQRM is a
> > matter of
> > triangulation. When the DQRMer is 60db over S9 at your location, you
> > can be
> > pretty sure that station is nearby. If you fill out the
> > form at
> > www.dqrmreport.com, the data will be collected and analyzed to
> > produce a
> > reasonably accurate map of the DQRMer's location. This data will
> > allow a
> > close-in search in the DQRMer's area and, using local transmitter
> > hunting
> > devices, the offender will be identified. This is a real-time system
> > that's
> > been in development for several years; its first major test will
> > be the
> > 2015 K1N Navassa DXpedition.
> > WHAT YOU DO: Fill out the form with as much information as you can
> > provide.
> > All information will remain confidential. The form will go into a
> > database
> > and the DQRM Project software will do the rest. We can stop DQRM -
> > and you
> > can help!
> >
> > Doug
> >
> > "There are some ideas so absurd that only an intellectual or lawyer
> > could
> > believe them." - George Orwell, 1984
> >
> >
> >
> > ---
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> >
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> >
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