[TowerTalk] Ferrites 31 vs. 77 material

[Roger Parsons]

K9YC wrote:

<The thing he missed, and that I also missed until recently, is the effect of component tolerances. >

Sorry for the delay in responding - I was away.

I was aware around 40 years ago that certain (but not all) mixtures for ferrites were subject to significant variation in some parameters between batches (although not generally within the same batch). This was based on published information from Neosid (a significant European manufacturer), and this I believe was general knowledge amongst those working in that field. I would imagine that processing has improved since then, but this must still be to some extent true.

So no, I don't believe that Steve missed anything.

73 Roger
VE3ZI