On 17.10.11 10:18, Jan de Kruyf wrote:
> I have seen a 1 inch stub of earth wire connected within the screened off
> area disturb the entire works. I acted as a beautiful little aerial.
> So this is what motivated my choice of a biggish core and couple all the
> wires of the mains-lead together, and not as in a commercial mains filter
> have the earth wire spit off.
Yes, if a line filter is so badly miswired that the earth connection is
missing, then its common-mode EMI rejection would be severely
compromised. The effect is though completely predictable and avoidable.
(As is running any appreciable length of earth wire to the filter, since
that's an inductor at RF, and every additional inch defeats the filter a
little more. Broad woven braid helps if a few inches are unavoidable.)
It's hard to muck up putting the power cable through a toroid a few
times, so that is possibly simpler, if only a little filtering is needed.
> But we will only see once the problem is resolved what the truth is going to
> be, as usual.
Yes, speculating is entertaining, but now we're just waiting for the
chase. :-)
Erik
--
Wizards had always known that the act of observation changed the thing that
was observed, and sometimes forgot that it also changed the observer too.
Terry Pratchett - Interesting times
------------------------------------------------------------------------------
All the data continuously generated in your IT infrastructure contains a
definitive record of customers, application performance, security
threats, fraudulent activity and more. Splunk takes this data and makes
sense of it. Business sense. IT sense. Common sense.
http://p.sf.net/sfu/splunk-d2d-oct
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
