"Jim Weir" wrote in message
...
There are three active pins on a mic plug:

The long metal shaft closest to the connections is common, or ground.

The next section is called the ring, and it is the microphone audio.

The top section is called the tip, and it is grounded when you want to put
the
radio into the transmit mode.

I don't understand what the mic cable with a "screen" is. If by "screen"
you
mean a braided shield, that is the common (ground) connection.

The inner wire is the microphone audio lead.

We used to sell E951s. I haven't seen one in twenty years.

Jim

Thanks Jim,

Well I now have three. Two (as new) I have had for 15 years and this one I
picked without the mic plug. My son comes with me and now he has started to
bring a friend along I needed another headset. On the basis that using the
same type might be better than matching this $10 third headset seemed a
find.
Audio is fine as good as the others so it is just a matter of connecting up
the plug to have that one back in business.

sg