• m3t00🌎@lemmy.worldOP
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    1 year ago

    omg, usually you could just swap in a working one from another TV/radio. if it work you knew which one to buy. pins match, good

    • AFK BRB Chocolate@lemmy.world
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      1 year ago

      Just because the pins matched didn’t mean the tubes were the same. Also, remember that the whole point was to take all the tubes out and take them to the store where this tester was to figure out which tube was bad. So if you didn’t know where a tube went, swapping with another set (if you happened to have one) wasn’t helpful because if was more likely to be a good tube.