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Author Topic: Wire to use for 3-conductor audio jack plug  (Read 1658 times)
AG4DG
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« on: March 18, 2007, 07:10:22 PM »

The 3-conductor audio jack plug I'm referring to is the third one in the picture at http://en.wikipedia.org/wiki/Jack_plug

The problem is that I haven't been able to buy any 3-conductor wire assemblies.  I only see the 2-conductor speaker wire assemblies out there.

So what's the proper way to attach the wire?  Is one of the three conductors in the connector open-circuited?  If so, which of the conductors is open circuited?  Or if none of the three conductors is supposed to be open-circuited, then which of the two conductors need to be joined together?
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K0RFD
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« Reply #1 on: March 18, 2007, 07:30:51 PM »

It would really help to know what your application is.

If you don't want to mail order two-conductor-plus-shield  cable (or if Radio Shack is out of 278-513) visit a local music shop that caters to working musicians and buy some microphone cable.  I'm really partial to the stuff my local Peavey dealer sells by the foot.  Thin, flexible, 100 percent shield (foil plus braid).

But please, pray tell, what are you wiring?
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AD5X
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« Reply #2 on: March 18, 2007, 07:31:26 PM »

You're referring to stereo connectors which have tip/ring/ground connections.  Use 2-conductor shielded cable.  One conductor goes to the tip, one to the ring, and the shield goes to the sleeve or ground.  I think you can still buy this cable at Radio Shack.  Or order from www.allelectronics.com, part number MC-2 (10-feet for $4.50).

Phil - AD5X
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NA6M
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« Reply #3 on: March 18, 2007, 07:48:36 PM »

If you are connecting a balanced microphone or line level signal, you will want a shielded twisted pair.

This link should help:

http://www.belden.com/pdfs/Techpprs/wcfsbetp.htm

73 de na6m
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W3JJH
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« Reply #4 on: March 19, 2007, 08:41:07 AM »

Belden 8402 is a rugged cable that has been used by pro audio OEMs for many years.
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