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Eminent Omegan 7500 Noise Problem

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  • Eminent Omegan 7500 Noise Problem

    Hello friends, newbie here.

    I got old Eminent organ. The pedals don't work and a few dodgy notes here and there on certain settings. But that's not the main problem. Every few minutes there's this low freq sweeping sine wave appears out of nowhere for a few seconds, followed by white noise hiss and it disappears again. I was about to take this organ to my local chapel. Good thing I discovered this problem before that.
    I did the only thing I can, that is disconnected everything that can be easily disconnected.
    I came to a conclusion that this anomaly comes from the expression board as you can see in the video there is nothing else left in there, other than the amp.
    I dont even know where to begin, what to check. I have a multimeter and a soldering iron, thats about it.
    any help, advice would be greatly appreciated.

  • #2
    Here is another clip, sounds like a demon trying to escape. Scary.

    https://imgur.com/7HT0pIv

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