On 1/28/12 11:47 PM, John Paul Gripp wrote:
Hello All,
I have been having a problem with my smoke detectors going off every
time I
run my SGTC or VTTC. I am assuming it is EMI/RFI that is causing
it. It
would not be so bad, except that I live in a townhome and it tends to
set
the smoke detectors off at my neighbors place as well. Has anyone ever
dealt with this before? Anyone have any clue what I could do to
prevent it?
I wouldn't want to have to chose between moving and coiling!
What are your sparks arcing to, and what is the return path for the
current to the coil? You might be inadvertently setting up a good
"transmitter" with a big loop.
What I would NOT do is try to engage in a EMI filtering campaign with
the detectors. You might, though want to see if you can get one of
the detectors (same brand and model) and hook it up as a test fixture.
You want to know whether the EMI is getting into the detectors via
conduction (e.g. power lines from your coil) or radiation (the power
lines for the detectors are acting as antennas).
if it's the former, then adding filtering on your power supply might
help.
If it's the latter, making sure you're not radiating (return path for
sparks, etc. Maybe a faraday cage, but I'm not sure that is practical
or will work well in your situation.
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