CI-V interface using the NTE7142 IC:

And the 'custom' case it fits in.  Finally a use for those old mics.

The chrome mini-8 goes to the CI-V Remote Control Jack.

The black mini-8 goes to the HSEND/VSEND (depending on mode) jack on the accessory breakout box for PTT functions.

13.8-Volts come from the accessory breakout box.

The circuit I used for this came from KD6UU with the exception of the chip used (NTE7142 instead of LTC1383) and the source of power to pin 16.  This circuit (and or variations of) can be found all over the net.

The PTT circuit is also a commonly found one on the net.  I modeled mine after the one shown with the IC706_BKT Icom Control software.  I didn't have any 2N2222's, so I used a BC107 which works just as well.

The accessory breakout box:

This box idea came from Greg Ordy W8WWV's web site.

The audio OUT (from the radio) circuit came from ZR6DXB's website.  The transformer (one of the 2 green things inside, left) is a Radio Shack part #273-1374 1:1 Isolation Transformer.  The connection simply comes from the light-blue wire (pin #12) and ground (pin #2), through the transformer to the line-in on the computer (not mic-in).

I tried ZR6DXB's circuit for the audio IN (to the radio), but for some reason it didn't work.  I probably wired something wrong.  I later came across a different circuit that put the variable resistor on the other side of the transformer.  I wired this (correctly?) and it worked fine.

On the side photo you can see the bolt that's holding the ground terminal strip which can be seen inside on the top-middle.  The hole to the right an up from the bolt is the access for the variable resistor for the audio in.