: I missed that post, but I'll respond now. The reason is VERY simple. The
: noise is NOT a differential signal, so filters don't work to kill it. It
: is a COMMON MODE signal, which causes common mode current on the AC
: line, so you need a COMMON MODE CHOKE to kill the current. The current
The odd part is, to me, anyway, the noise was extremely limited until I
added the filters.
No filter, little noise, filter at the source, major noise on the previously
quiet wiring.
At that time I didn't have ferrite to play with. I have since found a
source and I'm getting a handful a week of various types and configurations
for about 25 cents a piece. I've had good luck so far with a few things but
haven't done the previous experiment yet. Will do later.
What I'm finding I need more than HF chokes is a source of clamp on VHF
chokes. Seems these LED lights I bought are silent at HF because they
obliterate FM broadcast.
Kurt
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