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  1. Carbsandcaps

    MPX 19khz amplitude question

    I was wondering if anyone knows at what amplitude the 19khz tone has to be at to “activate” the mpx. I’m trying to get a relay to work in a fisher mpx unit but I can’t get a good mpx signal where I’m at so I’m using a signal generator. I can get voltage at the relay coil but it’s varies pretty...
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