Comment on 50ohm goes brrrrrr

Remember_the_tooth@lemmy.world ⁨2⁩ ⁨days⁩ ago

• deranger@sh.itjust.works ⁨2⁩ ⁨days⁩ 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 ⁨2⁩ ⁨days⁩ 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 ⁨2⁩ ⁨days⁩ 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 ⁨1⁩ ⁨day⁩ 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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    • Eranziel@lemmy.world ⁨20⁩ ⁨hours⁩ ago

      That’s my understanding as well. I’ve seen dummy loads used when testing transmitters at power so that nothing gets too hot. They usually have a big aluminum heat sink.

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