Rick, Agreed. And it is beginning to look like there is a need to build and test such a thing to really learn it’s value. For instance, I never knew how useful an my nanoVNA would be until I bought one. Sure, I could do an SWR study the old way, but the new widget enables me to do a lot more, faster and easier.
I just threw this question out this morning for discussion, and got my money’s worth from everyone. It was academic at that time, but now I am wondering all the more why there isn’t some video on YouTube showing some ham who has built such a device. It seems like this is something wanting to be made, at least for ham use. Mark > On Mar 10, 2021, at 2:59 PM, Gary Sitton via BVARC <[email protected] > <mailto:[email protected]>> wrote: > > Rick: > > I really agree especially since I've looked into the drone motor > controllers. > They typically emit so much onboard and radiated hash that special by-pass > precautions are taken with some of the onboard sensors, e.g. accelerometers > for orientation sensing. I disagree that modelling software is adequate for > the typical antenna environment, e.g. antennas below a wavelength. Also > conformation of directional antenna's front-to-back and forward gain for > optimization purposes would be nice if even perhaps extravagant. > > 73, Gary K5AMH > > PS: Most drone controllers use the STM ARM processors for which there > is free open source drone software: https://betaflight.com/ > <https://betaflight.com/> > > > On 3/10/2021 2:34 PM, Rick Hiller via BVARC wrote: >> Comment: Is an FSD applicable? >> >> Although an FSD would provide a close-in Far Field pattern of an antenna >> antenna installation, which is very cool indeed. Is it really necessary in >> the world of Ham Radio? >> >> We already have antenna modeling software based on the NEC which is quite >> accurate, depending on the set up parameters provided, of course. That >> model analysis provides us with a pattern and a fair amount of operational >> information. >> >> But what do we (I) really want? I want to know what and how my antenna is >> performing in the real world outside of my QTH. Is it getting to Europe or >> VK? When is the best time and frequency to get to Japan or South Africa? >> Questions like this are not to be answered by a FSD. >> >> What we really need is a world wide system to detect our signals wherever >> they may occur. So let's start thinking of that. We just need a few hams >> on every continent to participate........Wait! Not so fast.......there is >> already a system that does this. WSPR and it is available from a local >> amateur radio dealer -- SOTA Beams >> https://www.sotabeams.co.uk/wsprlite-classic >> <https://www.sotabeams.co.uk/wsprlite-classic>. QST Dec 2018 even has a >> review of this system. >> https://www.sotabeams.co.uk/content/QSTREVIEW.pdf >> <https://www.sotabeams.co.uk/content/QSTREVIEW.pdf> >> >> Now look, I am not poo pooing the FSD concept , ideas, discussion, etc. >> Very cool indeed to get a group of folks excited and discussing antenna >> stuff. Woo Hoo! I'm all for it, being the antenna phreak that I am. I'm >> just taking a step back and seeing if it is necessary, practical or even >> applicable for Hams. Plus, maybe some don't know about WSPR. >> >> 73...Rick -- W5RH >> >> >> >> >> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> >> Virus-free. www.avast.com >> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> >> On Wed, Mar 10, 2021 at 1:57 PM Jeffery MacMillian via BVARC >> <[email protected] <mailto:[email protected]>> wrote: >> Here is a good paper on this very topic..... >> >> https://www.narda-sts.com/en/selective-emf/srm-3006-field-strength-analyzer/eID/pd/pdce/9063/pdfr/9500/ >> >> <https://www.narda-sts.com/en/selective-emf/srm-3006-field-strength-analyzer/eID/pd/pdce/9063/pdfr/9500/> >> >> have Fun, >> Jeff >> KC5TT >> >> >> >> >> On Wed, Mar 10, 2021 at 1:31 PM Tom Watson via BVARC <[email protected] >> <mailto:[email protected]>> wrote: >> Brilliant! >> >> On Wed, Mar 10, 2021, 12:22 AM Mark Brantana via BVARC <[email protected] >> <mailto:[email protected]>> wrote: >> OK, what is an FSD? It is a Field Strength Drone. It’s an idea I am sure >> others have had, and I don’t expect to get around to designing or patenting >> such a thing. But inventions are often just the merging of new technologies, >> and this is not much different. I don’t see any YouTubes about this or any >> other reference, so here’s the idea: >> >> With all the capabilities of little drones I wonder if anyone has designed >> one which can carry a field strength meter and fly a grid around an antenna >> to evaluate antenna performance. The guts of my little Radio Shack FSM would >> have weighed way less than an ounce. >> >> Ideally, the field strength meter could communicate to the base through the >> drone transmitter, reducing weight. Software at the base could link the >> drone 3D location data with the FS reading. The drone would have to wait at >> test locations for the operator to transmit, and ideally would move to the >> next location. Finally, the software might be able to link with existing >> simulation software for comparison with theory and allow for simulation >> model improvement. This looks like it would take a small team to develop. >> >> This sounds like it would have many uses besides antenna evaluation, like >> RFI evaluation. >> >> What about it? Has anyone done this? >> >> Mark >> N5PRD >> ________________________________________________ >> Brazos Valley Amateur Radio Club >> >> BVARC mailing list >> [email protected] <mailto:[email protected]> >> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >> <http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org> >> Publicly available archives are available here: >> https://www.mail-archive.com/[email protected]/ >> <https://www.mail-archive.com/[email protected]/> >> ________________________________________________ >> Brazos Valley Amateur Radio Club >> >> BVARC mailing list >> [email protected] <mailto:[email protected]> >> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >> <http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org> >> Publicly available archives are available here: >> https://www.mail-archive.com/[email protected]/ >> <https://www.mail-archive.com/[email protected]/> >> ________________________________________________ >> Brazos Valley Amateur Radio Club >> >> BVARC mailing list >> [email protected] <mailto:[email protected]> >> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >> <http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org> >> Publicly available archives are available here: >> https://www.mail-archive.com/[email protected]/ >> <https://www.mail-archive.com/[email protected]/> >> >> >> -- >> Rick Hiller >> e-mail: [email protected] <mailto:[email protected]> >> Cell: 832-474-3713 >> Physical: 9031 Troulon Drive >> Houston, TX 77036 >> >> >> ________________________________________________ >> Brazos Valley Amateur Radio Club >> >> BVARC mailing list >> [email protected] <mailto:[email protected]> >> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >> <http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org> >> Publicly available archives are available here: >> https://www.mail-archive.com/[email protected]/ >> <https://www.mail-archive.com/[email protected]/> > > -- > Gary Sitton, K5AMH > [email protected] <mailto:[email protected]> > SDR/DSP Consultant, > "Have FFTs, Will Travel." > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] <mailto:[email protected]> > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/[email protected]/
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