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:[email protected]] On Behalf Of [email protected] > Sent: Sunday, February 08, 2015 12:18 PM > To: [email protected] > 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" <[email protected]> > 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 > > > > > > > > --- > > This email has been checked for viruses by Avast antivirus > > software. > > http://www.avast.com > > > > _________________ > > Topband Reflector Archives - http://www.contesting.com/_topband > > > > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
