In a message dated 5/21/99 7:46:30 AM Pacific Daylight Time,
Robert.Harrington@Wichita.BOEING.com writes:
<< We
suspected the shielding around the ignition >>
Ignition transients getting into your camera are almost certainly the
problem. Particularly if you're using solid core wires. You're engine is
transmitting RFI (Radio Frequency Interference) to everything nearby. You
really don't need solid core wires to get good ignition performance.....in
fact sometimes they reduce performance as its harder to contain the energy
and they can arc over, causing mis-fires. FYI, running solid core wires is
technically illegal due to the interference they cause. They are no longer
permitted on street cars.
Suggest changing wires to any high performance wire with some inherent
resistance and the problem should be improved, if not cured.
You didn't say what type of ignition you were running, either. A CD ignition
will generate more high voltage, high frequency noise than a conventional
inductive storage type. If you followed the earlier thread on ignitions, I
recommend inductive anyway, so you might consider looking into that.
As far as electrical shielding goes, its virtually impossible to completely
isolate the camera unless you have it in a Faraday cage (completely shielded
with metal, or wire screen). The problem is where the wires and lens must go
in and out...they also allow transients in and out too....so shielding the
camera is not practical.
Another common source of electrical noise from vehicles is the
alternator/generator. You didn't say if you were running one. If you are, a
large filter capacitor on the output terminal may also help. These are
available at any Radio Shack.
Regards,
Myles H. Kitchen
1965 Lotus Cortina Mk1 #128
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