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Parallel FX Loop help

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  • Parallel FX Loop help

    Hi Folks, I'm trying to add a parallel effects loop with mix control into a standalone preamp. It is for line level effects, recovery gain is not needed.
    Seemed simple enough, but the circuit as-is is causing distortion/signal loss even with nothing in the loop.
    Must be a loading issue? I'm having trouble following the impedances here. Each of the triangles are Mosfet buffers, output Z around 100 ohms.
    Click image for larger version

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    Or if there's an entirely better way to implement this, I'm all ears.
    Thanks for looking --
    Last edited by hylaphone; 12-30-2018, 09:50 PM.

  • #2
    Oh boy, bad solder joint.
    When will I learn to take a deep breath?

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