Back ~ 2000, I was using 77 material vs. 43 material for Ferrite chokes and I
constructed an impedance table by freq.to determined how many beads I should
use on each band. Now we talk about and use 31 material instead. What I don’t
recall is what happened to the 77 material and why 31 material has seemingly
supplanted it.
I would appreciate any thoughts/comments/comparisons on this.
Tnx &73
Bob KQ2M
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