[amsat-bb] Pin assignments on a stereo mic input?

[Bill Acito W1PA]

One more for today...  I am using a stereo digital recorder for logging. It 
has a stereo 3.5mm mic socket.
I am using a "attenuating" patch cable from the HT audio into a "stereo 
splitter" plugged into the mic input
(it has a stereo plug, and two mono sockets ---  tip and base, and ring and 
base). The other side of
the splitter has a mic.  So the intent it to put the HT into one channel, 
and the external mic (recording me)
into the other channel, when recording.

I am only hearing the HT audio on playback. I have a feeling that the plug 
"base" connection is not ground --
it is on the ring or tip.

Any one have or know the signal assignment on a recorder mic jack?  base, 
ring , and tip?  I would assume
it would also match the assignment of the mic input of a PC (if you know 
that)?

Bill
W1PA