The static on old CRT TVs with rabbit ears was the cosmic microwave background. No one in the last 25 years has ever seen it.

    • LovableSidekick@lemmy.world
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      8 hours ago

      Like when the black and white world suddenly got colorized! My grandpap told me about them old days - when the lawn, the sidewalk and the sky were just different shades of gray.

  • bonn2@lemm.ee
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    9 hours ago

    2001 here literally grew up with CRT static, you have your years a bit off there.

    • TwanHE@lemmy.world
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      7 hours ago

      I was about to say, i think we had a CRT till about 2010. My grandma still has one upstairs so even my youngest cousins still grew up with it.

    • LovableSidekick@lemmy.world
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      7 hours ago

      Random radio sources, but a small part of the signal is CMB. I wasn’t sure what you even meant by thermal noise but I believe it’s a phenomenon of flatscreens. I found something that said it was “similar to snow on analog TVs” - so apparently there’s a difference.

      Funnily, Google AI says, “In the 1940s, people could detect the CMB at home by tuning their TVs to channel 03 and measuring the remaining static after removing other sources. This allowed them to prove the Big Bang before scientists did.” So they had that going for 'em, which is nice.

      • piecat@lemmy.world
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        6 hours ago

        “Thermal Noise” is a phenomenon where everything makes EM noise, just from thermal energy.

        If you were to put such a TV in a faraday cage, with an RF termination, you would see something similar. Because noise is inherently part of the circuitry and amplifiers.

  • Blackmist@feddit.uk
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    10 hours ago

    Last time I thought about static I wondered why colour TV didn’t show colour static.

    Turns out the colour signal was on very specific frequencies, and if it wasn’t present, it would assume it was a black and white signal and turn off the colour circuit.

  • dual_sport_dork 🐧🗡️@lemmy.world
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    14 hours ago

    Tube TV’s remained in common service well into the 2010’s. The changeover from analog to fully digital TV transmission did not happen until 2009, with many delays in between, and the government ultimately had to give away digital-to-analog tuner boxes because so many people still refused to let go of their old CRT’s.

    Millions of analog TV’s are still languishing in basements and attics in perfect working order to this very day, still able to show you the cosmic background, if only anyone would dust them off or plug them in. Or in many retro gaming nerds’ setups. I have one, and it’ll show me static any time I ask. (I used it to make this gif, for instance.)

    In fact, with no one transmitting analog television anymore (probably with some very low scale hobbyist exceptions), the cosmic background radiation is all they can show you now if you’re not inputting video from some other device. Or unless you have one of those dopey models that detects a no-signal situation and shows a blue screen instead. Those are lame.

    • Captain Aggravated@sh.itjust.works
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      9 hours ago

      Amateur radio operators are indeed allowed to transmit analog NTSC television in the UHF band. It’s most commonly done on the 70cm (440MHz) band, and a normal everyday 90’s television is all you need to receive the signals. You’d tune to what would have been cable channels 57 through 61. The use cases for this have decreased in recent years; for example you used to see hams using amateur television to send video signals from RC aircraft or model rockets, now that’s done with compressed digital video over something like Wi-Fi and doesn’t require a license. But, it’s still legal for hams to do.

    • RaoulDook@lemmy.world
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      10 hours ago

      I think my mom still uses the last CRT TV that I had. Gave it to her when I bought my first 720p HD TV, as the old CRT was better than her old TV. Later on I also gave her that HD TV but she still has the CRT too.

  • mlg@lemmy.world
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    8 hours ago

    Dude Flatscreen HDTVs were expensive even in 2008, and cable actually got worse for higher price so most people were hooked into local broadcast.