On 10/15/2011 8:14 PM, Ron D'Eau Claire wrote:
> Back in the dark ages we had air core baluns. They were HUGE - an HF balun
> might take up a couple of cubic feet of space - but they were impervious to
> such failures since air doesn't saturate or crack, Hi!

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
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