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In a message dated 1/11/2008 8:52:14 A.M. Central Standard Time,
tom.gourley@verizon.net writes:
By the way, small magnets are an entirely
different story, which should be no surprise. I found a small
round refridgerator magnet that caused a noticeable defleciton, up
to 5 degrees, in my pocket compass from as much as 2 feet
away. A magnetized screwdriver produced similar results. I suppose
if your nutplates have been stuck to a magnet for a while they might cause
some compass error within 3 or 4 inches of your mag compass, so don't use a
magnetic pickup to get nutplates out of the parts
drawer.
Tom,
Interesting tests. I have a vertical card compass mounted to the
glare shield to keep it as far away from electrical influence as possible.
A SS screw placed near the compass is a problem since most of my screw
drivers are magnetized. So far I have been lucky in not damaging any
sensitive pivots in the compass by not using the heavily magnetized
drivers whilst screwing. Card compass damage from this
mistreatment is well known while there is no such effect on liquid
filled compasses.
Drat, so many little things that can do ya in...................
Grayhawk
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