While we are daydreaming about locating RFI sources with drones - here is
more food for thought:
https://www.modernpowersystems.com/features/featurepotential-game-changer-finding-imminent-power-line-faults-before-they-happen-8025876/
I am thinking this might be something like the sensors & algorithm system
which allows for lightning detection.
Blitzortung.org
~ Alan K0AV
On Sat, Dec 31, 2022 at 8:03 AM Dave (NK7Z) <dave@nk7z.net> wrote:
> Ed,
> I was board one day a few years ago, and took out with my mobile rig,
> and its rear mounted vertical... I plotted signal strength points all
> around a known RFI source to see if an isoline map might help locate a
> hard to find source... It actually did indicate the area for the source
> quite accurately... One of these days, I will actually use that process
> in a locate...
>
> I have this dream of a drone, a computer, more programming experience,
> and money than I currently have... Wouldn't it be cool to just let a
> drone off, have it grid up an area, take signal strength readings at a
> set altitude, then have a computer take the results and create either a
> heat map, or an isoline map...
>
> Anyway, someday I may tackle that project but not soon...
>
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
>
> On 12/31/22 06:40, Hare, Ed, W1RFI wrote:
> > If you are trying to locate a noise source, if a directional antenna is
> available at the ham's QTH, that is the place to start. It will give a
> general direction for that walk-around.
> > ________________________________
> > From: RFI <rfi-bounces+w1rfi=arrl.org@contesting.com> on behalf of Pete
> Smith N4ZR <pete.n4zr@gmail.com>
> > Sent: Saturday, December 31, 2022 8:03 AM
> > To: rfi@contesting.com <rfi@contesting.com>
> > Subject: Re: [RFI] Yagis and DFing
> >
> > Or use a Moxon which has a deep null off the center of the back
> >
> > 73, Pete N4ZR
> >
> > On 12/30/2022 7:19 PM, David Eckhardt wrote:
> >> Use the sharp *nulls off the sides* of the Yagi. They are far sharper
> than
> >> the "gainy" front lobe.
> >>
> >> Dave - WØLEV
> >>
> >> On Sat, Dec 31, 2022 at 12:01 AM Jim Brown<jim@audiosystemsgroup.com>
> >> wrote:
> >>
> >>> Remember that Yagis only have their intended directivity in the
> >>> frequency range for which they are built.
> >>>
> >>> 73, Jim K9YC
> >>> _______________________________________________
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> >>>
> >>
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