> You can still get non linear enough to screw up the IMD, though, if the flux
> density is too high.
That might be true in some cases. I recently measured IMD on a 73
material for an antenna question and found heating occured long
before IMD became a problem.
But if the cicuit is a resonant high Q circuit, the IMD problem is
worse! That's because the IMD is caused by the non-linearity shifting
the resonant frequency of the core.
In a broadband transformer or low Q circuit, IMD has never been a
problem in my experience unless the core gets VERY hot (with the
exception of low duty cycle and dc bias saturation.)
73, Tom W8JI
w8ji.tom@MCIONE.com
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