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Blue Mountain Magnetometer Swing on Broadcast

 
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bferrell(at)123mail.net
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PostPosted: Fri Nov 30, 2007 8:48 am    Post subject: Blue Mountain Magnetometer Swing on Broadcast Reply with quote
Has anybody solved an issue with thier EFIS mag heading swing when they
broadcast

I've got a Velocity XL and BMA Gen 3 EFIS/1. I've worked pretty hard to get the
heading accurate (including moving it from the nose/canard area to the strake
where there's no metal aside from the wing bolts, which are about a foot away,
where the com coax runs through to the winglet), but now I find that when
taxing around the airport, if I broadcast the mag swings way to one side, and
then returns when I unkey the mic. How irratating. Anyway, I ran shielded wire
to the mag, which I think is unterminated on the mag end, and terminated on the
EFIS end, but I'll have to check. Thoughts?

Also, the strobe wires run through the same area, but don't seem to affect mag
heading.

Brett

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