[RFI] DSL Filter Update

Jim Brown jim at audiosystemsgroup.com
Sun Mar 8 19:16:27 PDT 2009

On Sun, 8 Mar 2009 17:46:37 -0700 (PDT), Roger Parsons wrote:

>but a cut-off of 3MHz would not protect against a 160m transmitter
> at all - which is where this all started.

You're looking at the elephant through a differential-mode hole in 
the tent. Don't rule out the value of common-mode suppression, which 
is considerable. The KY and K-Com filters are both quite well 
thought of (because they work), and they are ONLY common mode 
chokes. I do think it is important that they are VERY GOOD common 
mode chokes. 


Jim Brown K9YC

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