[Elecraft] Toroid Balun Cores

[Ron D'Eau Claire]

Why would you think that?  Properly designed, an air core balun and a
ferrite core balun are electrically identical. 

I did not mean to imply there's an inherent "defect" in ferrite cores, but
they have limitations that air core inductors do not that must be considered
in any design using them. We accept those limitations because toroidal cores
also have major advantages over air core inductors, such as smaller size and
inherent magnetic self-shielding. 

73, 

Ron AC7AC

-----Original Message-----

They also didn't do much except make us feel better. Ferrite core chokes 
actually DO something useful.  The cracked balun was poorly designed, so 
it overheated.  That's a DESIGN mistake, not a "defect" of ferrite cores.

73, Jim K9YC