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shielded headset jack wiring?

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a.s.elliott(at)cox.net
Guest

Posted: Thu Oct 18, 2007 7:08 am Post subject: shielded headset jack wiring?

Gang:

  

 The wiring diagram for my radio seems to show a shielded pair going to the  mike connector (audio and key) and a single shielded wire going to the  earphones. 

  

 [1] Is it reasonable to use a single 3-wire shielded cable for this?  

  

 [2] If I use stick-mounted PTT switches, is there any reason to use run the  key wire all the way to the mike connector?   Couldn't I just run it  to the switch?  (Yes, I know that this would make it impossible to use a  remote PTT through the connector.)

  

 [3] If I do that, can I just run a shielded pair to the connector  (mike and earphones)?

  

 Andy Elliott, Mesa, AZ

N601GE (reserved)

601XL/TD/QB, Corvair,  building...

   [quote][b]

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nuckolls.bob(at)cox.net
Guest

Posted: Thu Oct 18, 2007 3:40 pm Post subject: shielded headset jack wiring?

At 07:58 AM 10/18/2007 -0700, you wrote:



 	  Quote: 	
		  Gang:



The wiring diagram for my radio seems to show a shielded pair going to the 

mike connector (audio and key) and a single shielded wire going to the 

earphones.



[1] Is it reasonable to use a single 3-wire shielded cable for this?


	


   It would be better to follow the manufacturer's

   instructions.



 	  Quote: 	
		  

[2] If I use stick-mounted PTT switches, is there any reason to use run 

the key wire all the way to the mike connector?   Couldn't I just run it 

to the switch?  (Yes, I know that this would make it impossible to use a 

remote PTT through the connector.)


	


    yes



 	  Quote: 	
		  

[3] If I do that, can I just run a shielded pair to the connector (mike 

and earphones)?


	


   They can be single shielded wires then. Use the

   shield as "ground" for the respective jack.

   Don't forget to insulate the jacks from a

   metal airframe.



   Bob . . .

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