Hey Pinnball,
You have the answer - an extra M215. Can you do an input output curve to see where clipping occurs in an actual unit? Other sites have had posts where owners assert that clipping does not start until 250 watts input.
Not hard, just vary the input voltage, monitor current and look at the output to see when clipping happens.
Thanks!
Steve
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consulting on geothermal heating/cooling & rational energy use since 1990
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