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Simple electrical System for wooden biplane VFR

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efraim.otero(at)gmail.com
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Posted: Wed Mar 07, 2012 6:18 am Post subject: Simple electrical System for wooden biplane VFR

Jerry!

Thanks for your answer. I have SL 40 magnetos and an aviation ignition

harness. Spark plugs are Champion massive electrode REM40E. Curious

thing is that a few months before I didn't get that noise. I have a

whip antenna connected to the Icom with RG58 coax... Any ideas?



On 3/7/12, racerjerry <gki(at)suffolk.lib.ny.us> wrote:

 	  Quote: 	
		   

 <gki(at)suffolk.lib.ny.us>



 What is your spark plug part number?

 Which magnetos do you have installed?

 Do you presently have unshielded (automotive type) spark plug wires?



 --------

 Jerry King





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 http://forums.matronics.com/viewtopic.php?p=367915#367915




	


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racerjerry

Joined: 15 Dec 2009
Posts: 202
Location: Deer Park, NY

Posted: Thu Mar 08, 2012 6:31 am Post subject: Re: Simple electrical System for wooden biplane VFR

I am unfamiliar with your magneto.  Check to see if your magneto “P” leads are shielded.  Typically, the “P” leads are made from 16 gauge shielded wire.  Look at the magneto end of the wire and you should see the shielding separated out and terminated into a separate ground connection at the magneto housing.



Due to vibration, it is fairly common to see this ground connection break and open up.  Since you say the interference problem only recently began, I suspect that this is what has occurred.

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