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Noise in Panel

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Deems Davis

Joined: 09 Jan 2006
Posts: 925

Posted: Fri Sep 22, 2006 3:49 am Post subject: Noise in Panel

I'm building my panel, and have it to the point where I'm checking 

things out on the bench (outside the a/c). Yesterday when checking the 

audio/Com/Nav functions I noticed noise coming through both the pilot & 

co-pilot headsets. I believe that the source/s of the noise 

(antagonist?) are the cooling fans that are internal to the EFIS/MFD 

systems that I have installed, as the noise is only present when these 

systems are powered on, and the noise changes , i.e. becomes additive 

when both systems are powered on. (It reminds me of flying the Baron 

with the props unsync'd). I'd appreciate any insight on how to trouble 

shoot this one. The Audio panel is a Garmin 340, all connections/wiring 

is with shielded wires w/shields grounded to the back of the rack per 

Garmins instructions.



Deems Davis # 406

Panel/Finishing

http://deemsrv10.com/

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