Yes they are! I have used many of those ferrite cores for that purpose over
the years. Wind as many turns of coax through them as possible. And make
sure there is no gap between the halves.
How they compare to stacked 2.4" 31 material toroids (which is what I've
used the past few years), I can't say.
73, Mike
www.w0btu.com
On Fri, Sep 8, 2017 at 2:23 PM, Carol Richards <n2mm@comcast.net> wrote:
> I have been cleaning out a shed with 50+ years of stuff. I found several
> yoke cores from the TV sets made in the 60's. Are they usable for common
> mode chokes?
>
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