50ohm goes brrrrrr

Comments

• marcos@lemmy.world ⁨4⁩ ⁨weeks⁩ ago

  Just to point out, because it’s bothering me way more than it should…

  But the electric and magnetic peaks align with each other’s valleys, not with each other’s peaks.

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  • ChaoticNeutralCzech@feddit.org ⁨4⁩ ⁨weeks⁩ ago

    No, they fucking don’t

    en.wikipedia.org/wiki/Maxwell's_equations#Vacuum_…

    Image

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  • tate@lemmy.sdf.org ⁨4⁩ ⁨weeks⁩ ago

    You’re describing circular polarization. It’s not the only way.

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  • captainlezbian@lemmy.world ⁨4⁩ ⁨weeks⁩ ago

    Yeah, because it’s not pulsing in intensity, it’s pulsing between which kind of energy it’s being

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  • mexicancartel@lemmy.dbzer0.com ⁨4⁩ ⁨weeks⁩ ago

    Well it’s wrong. I suppose you are thinking so because Maxwell’s equations shows B depending on (∆E/∆t)[i cant write \partial symbol], BUT remember LHS is not B but is curl(B) so derivative acts on both sides. So they are in phase and not 90° out of phase. So the peaks should align

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  • Techlos@lemmy.dbzer0.com ⁨4⁩ ⁨weeks⁩ ago

    Maybe it’s showing polarization superpositions of the E-field?

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• Remember_the_tooth@lemmy.world ⁨4⁩ ⁨weeks⁩ ago

  I get the reference to the original meme. I don’t understand the EM spectrum component, though.

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  • deranger@sh.itjust.works ⁨4⁩ ⁨weeks⁩ ago

    They wish they were in an antenna and going out as radio waves, but instead they’re in a dummy load. 50ohm is a common antenna impedance.

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    • Remember_the_tooth@lemmy.world ⁨4⁩ ⁨weeks⁩ ago

      Thanks. That puts me on the right track.

      onallbands.com/ham-radio-101-dummy-loads-smart-id…

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  • hedgehogging_the_bed@lemmy.world ⁨4⁩ ⁨weeks⁩ ago

    Had to go get my radio-tech spouse. His reply “Oh, that’s the dumb name for a terminator…”

    Apparently “dummy load” isn’t what they call them in the USAF

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    • einfach_orangensaft@sh.itjust.works ⁨4⁩ ⁨weeks⁩ ago

      i might be wrong here but i think a dummy load is different from a terminator, they both 50 ohm, but a terminator is more like a connector cap, while a dummy load is designed to dissipate heat and can often take many watts of power over extended time without starting glow

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• JackbyDev@programming.dev ⁨4⁩ ⁨weeks⁩ ago

  My reaction while reading this.

  Heathcliff in a ham helmet

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