On Mon,2/1/2016 9:08 AM, Hare, Ed W1RFI wrote:
I have seen filters for both the load and lamp side, so you may need to try
both.
Hi Ed,
In my experience, conventional filters on the line side are less
effective (often ineffective) if the mechanism is common mode. Remember
that the definition of common mode for us is very different from that in
the AC power world, where they are talking about voltage between neutral
and green, and we are talking about current longitudinally along the
cable. Indeed, the RF current is often on the Green wire (thanks to
improper or missing bonding inside the noise source), and the Green wire
goes right through commercial filters.
Our definition is what radiates, and in my experience, is most
effectively suppressed with a multi-turn ferrite choke with all three
conductors passing through the ferrite.
73, Jim K9YC
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|