[Elecraft] OT; large ferrite toroid core?

[Fred]

Jim, K9YC, has done a ton of research on ferrites for baluns and 
chokes.  I think jim at k9yc.com will get you to his published results.  If 
6.6 uh/4 turns is correct, you might be able to figures out the ferrite 
mix from his data.
-- 
73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Mike Maloney wrote on 10/21/2021 11:24 AM:
> We were gifted a somewhat large (6"OD, 2.6" ID, 9/16" thick) ferrite core of unknown mix and original use.   On face was marked 6.6uH w/4turns.   My thinking it might make a good common mode RF choke on the output of an inverter generator or on coax feedline.    Not familiar with properties of toroid cores of this size.   Any ideas?
> 73, Mike AC5P
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