[TCML] Fried It !/filtration
dave_p at comcast.net
Tue Nov 9 20:28:56 MST 2010
Random thoughts, from some history in the field:
as noted, limitation exists in EMI radiating around filters,
including with enough energy to damage things.
ANY wire can pick up and reradiate EMI.
While filters are somewhat directional, they are not
hugely so. If cheap: use back to back.
'line filters' are used to meet FCC/etc specs down
to fairly low freqs, disrecall limit but 100 KHz is tested to,
and lower. Likely data on line, if looked for.
Disconnecting victim leads, where practical (wiring to garage
door, irrigation controllers is effective, and MOST effective
if the disconnect is as near the 'victim' as possible.
While a coil operates at 100KHz, say, fair amounts of power
may exist at higher/harmonic freqs...
While cars do have electronics, the manufacturers (NOW...)
have fair experience (and embarassment) in getting them
emi/rfi resistant. There Are Tales from the old days...
New dwp: dave_p at comcast.net
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