I’m still a few days away from being back home but I dug up some information about the types of inductors that appear to be used for the 47 micro Henry in the low pass filter diode switching network decoupling system. ?The images of data sheets are attached and clearly show that you can expect series resonances ?well within the RF spectrum of our harmonics. ? This helps explain the bleed around (as great as -25 DB) that I unexpectedly discovered when measuring the RF filter performance, when no particular filter was selected.
that bleed around may be a major part of why we aren’t getting the harmonic suppression that we would want.?
it’s likely that the solution will be adding (or replacing )a small series inductor without a damaging series resonance. ? I think a few microhenries could easily be wound on a small ferrite or iron powder core and would do what we need. ?
Gordon Kx4z?
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