Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!fuhrman
From: fuhrman@Apple.COM (Cris Fuhrman)
Newsgroups: sci.electronics
Subject: Novice question about CD headphone wire
Keywords: headphone wire
Message-ID: <7601@goofy.Apple.COM>
Date: 9 Apr 90 05:02:24 GMT
Organization: Apple Computer Inc., Cupertino, CA
Lines: 45

Hi,

Ok, here's a situation that I've not been able to figure out.  I'm not an
Electrical Engineer, but I do know a little about electronics and how a
basic circuit works, so maybe someone can enlighten me.

I just bought a new set of headphones for my CD player (portable) and
while cutting them out of the box, I goofed and actually cut the
headphone wire in half, about 2" up from the jack.

No problem, I thought.  I've fixed this kind of stuff before; it only
requires stripping the wires and connecting them up again.  Well, to my
surprise, after stripping the two severed ends of the wires, I found
inside four shiny NON-INSULATED wires (each coiled around some fiber) all 
next to each other.  Hmmm, I thought.  How does this work if they're not 
insulated?  I'm a novice, so I continued connecting.
  
There were a total of 4 wires on each severed end:  a red, a green, and
two coppers (indistinquishable).  They are very fine wires, and each one
is wrapped around some sort of fibererous core.

			the green wire connects to the green wire,
			the red wire connects to the red wire,
			one of the remaining two copper wires connects to
				one of the remaining two copper wires,
				etc.

When all is connected, I get no sound.  Figuring I've incorrectly connected 
the two copper wires that were indistinguishable, I reverse them,
but still no sound.

Can someone out there tell a novice what's going on?  These headphones
were $25 and I don't feel that a stupid mistake like the one I've made
should cost me that much.

Thanks in advance.

-Cris

-- 
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|  Cris Fuhrman                    |  fuhrman@apple.com               |
|  10250 N. Foothill Blvd., #D5    |  "I'll do the best that I can"   |
|  Cupertino  CA  95014            |                    - Geddy Lee   |
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