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Joined 3 years ago
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Cake day: June 15th, 2023

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  • That “BY-S812-004” is interesting. I googled that and got similar hits for “S812” boards used as emulators of Japanese arcade games. I see lots of references to “Pandora’s Box” and “JAMMA”, whatever they are

    My educated opinion (after 2 minutes of Doing My Own Research) is you may have a Chinese knockoff of a Japanese knockoff of an arcade system. Reading up on the S812 arcade boards might yield some more information… Or might be a dead end!

    Good luck!






  • They’re still a thing, kind of. TV Antennas are still inherently wired this way, and need the part in the picture (a balun) to convert the signal from the “balanced” 300 ohm twin antenna wire to “unbalanced” 75 Ohm coax cable.

    Most TVs used to have the twin screw connections to hook directly to a roof antenna. But at some point (I’m guessing the 90s), more people got their TV directly from cable providers, delivered over Coax, so it made more sense for manufacturers to provide a direct coax input for the antenna.

    So now, if you do have a roof antenna it probably has the balun integrated right into it, so you can take the coax (hopefully through some lightning protection) directly inside.