[RFI] Common Mode Line Filter

David Cole dave at nk7z.net
Mon Aug 11 01:03:00 EDT 2014

Which forces me to ask...  What does the power company call common mode?

Thanks and 73's,
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On Sun, 2014-08-10 at 21:35 -0700, Jim Brown wrote:
> On 8/10/2014 4:25 PM, qrv at kd4e.com wrote:
> > Would this be a good general-purpose line filter? 
> No, because what the power industry calls common mode is not common 
> mode. :) The only effective common mode choke is a ferrite choke, 
> following the winding directions for coax of the same approximate size 
> for the frequency range of interest.
> 73, Jim K9YC
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