[AMRadio] D-104 wiring

[W5AMI]

On Fri, Jun 8, 2012 at 9:32 AM, John Coleman <jc at pctechref.com> wrote:

> Without tracing the wire inside the microphone, a quick way is to use and
> passive ohm meter that uses a 1.5 volt battery (do not use higher voltage
> ohm meters for this test) on the x1 or x10. When you connect it to the
> shield and the proper wire you should hear a click coming from the D104
> cartridge. Once when you connect and again when you disconnect.  If the
> microphone has push to talk you will probably need to lock the button down
> for this test.
> John, WA5BXO
>
>
I would venture to say the white wire is the audio line.  That would go to
the center of the jack.  Of course shield is ground to the case of the mic,
and I would tie black to it.  If I remember right, black is a direct ground
(-) side of the mic element, or just for the key circuit of the mic.
 Either way, I think you could tie black to the shield.

I would also suspect RED is the key line, but unless you have PTT wired up
in the rig, it's useless for now.  Have no idea what blue would be.  It's
been a while since I've used a D-104.