i should be writing

  • 9 Posts
  • 335 Comments
Joined 2 years ago
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Cake day: August 8th, 2023

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  • this is just small-ish magloop

    i’ve seen some people make magloops out of bike rims, it’s similar sized. the smaller it is the lower radiation resistance, higher currents and voltage on capacitor, narrower bandwidth, and lower efficiency. i don’t remember how it scales but efficiency goes up fast with size, 1m dia magloop is already better. downside is that tuning becomes impossible on higher bands (capacitance required for this is below minimum capacitance of capacitor that you have)


  • will it antenna? i think it will

    split ring resonator has already two different lengths of paths so - even without accounting on how these two interact - you could expect two different frequencies where it’s resonant, with peaks perhaps overlapping to a useful degree making a decently wide band possible. it looks a bit like halo antenna with parasitic, downside being that it’s probably a bit hard to feed it, circumference has to be halfwave on lowest frequency and if made for HF it’d be gigantic

    i think it’s more useful to think of magloop as extremely shortened, low impedance, low bandwith halo antenna















  • it’s quite big, expensive, and not readily sourced, so when it’s used, it’s better that it’s really worth it. i don’t think cessnas need starlink, it would be worth it if it’s needed, but i think they might be using inertial + gnss. i heard that some drones had russian sim cards recovered so apparently sometimes gsm is used too. internet connection increases microwave signature greatly, and i’m not sure when it’s worth it, other than in cases where video feed is transmitted back and drones are guided manually, but that’s sea drones only. cessnas targeting refineries can work fine with gnss (+ maybe some crude tercom?) because refinery won’t run away


  • not by any fucking stretch “all drones” operate on starlink, these small surveillance and fpv antitank drones are controlled directly by operator. couple of times starlink terminals were spotted on boat drones on black sea, but far from always. there was an incident where musk personally turned off starlink over black sea, when ukrainian sea drones were on the way to destroy ships in port of sevastopol. these drones drifted off uselessly, which gave russians warning, pushed dod to get exclusive use of some part of starlink, and pushed ukrainians to develop their own alternatives. nowadays ukrainians use their own communications. why are you talking about things you clearly have no fucking clue about?