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hiss

  1. J

    Repairing a BWD 521 cathode ray Oscilloscope - no traces, hissing noise

    Hi all. I recently purchased a (obviously) second hand CRO oscilloscope. It worked fine for a couple of days, I was just getting used to it. Then one day, I left it on for 10 mins or so with both traces active on screen. A while later, I heard this high frequency hiss, so I switched it off. The...

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