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shielded comm radio question

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mdnanwelch7(at)hotmail.co
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Posted: Wed Oct 27, 2010 7:18 am Post subject: shielded comm radio question

Hello group,

  

   Can someone with avionics wiring experience advise me whether or not I need

 shielded wire for my Icom A200 power in and out.  I will have a strobe light system.  I also have

 a King transponder.

  

   I have an ample supply 16AWG shielded tefzel.  I've wired the +12V & gnd for the KT 76

 with the shielded stuff so far.  (maybe I didn't need to.  ???)

  

   Should I use the shieded stuff for the Icom +12v & the ground, or the flash tubes supply, 

 or both?  The Icom is the mobile vehicle style , with the CB radio type tray (could be the same 

 tray the airplane version uses).  The factory wiring plug for the A200M uses just ordinary auto

 type wire.  Surely they know lots of line vehicles have strobes, too.  Right??

  

   I'm just not clear when shielded wire is really neccessary, or where it ought to be used.

  

  

 Thanks,   MIke Welch

 		 	   		    [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Oct 27, 2010 1:02 pm Post subject: shielded comm radio question

At 10:14 AM 10/27/2010, you wrote:

 	  Quote: 	
		  Hello group,



   Can someone with avionics wiring experience advise me whether or not I need

shielded wire for my Icom A200 power in and out.  I will have a 

strobe light system.  I also have

a King transponder.



   I have an ample supply 16AWG shielded tefzel.  I've wired the 

 +12V & gnd for the KT 76

with the shielded stuff so far.  (maybe I didn't need to.  ???)



   Should I use the shieded stuff for the Icom +12v & the ground, or 

 the flash tubes supply,

or both?  The Icom is the mobile vehicle style , with the CB radio 

type tray (could be the same

tray the airplane version uses).  The factory wiring plug for the 

A200M uses just ordinary auto

type wire.  Surely they know lots of line vehicles have strobes, too.  Right??



   I'm just not clear when shielded wire is really neccessary, or 

 where it ought to be used.


	




    Suggest you review chapters on noise in the

    'Connection. Shielding is a hedge against a

    particular form of coupling (electro-static)

    between a potential antagonist and a potential

    victim. Unless specifically called out in the

    manufacturer's installation instructions, don't

    bother.



    Shielding of power lines is never useful. If

    manufacturer's data does show shielded wire

    on power leads, I'd like to know about it.

   Bob . . .

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