It's a mono bus - just data and ground.
If you have a couple of transistors and diodes sitting around you can build at least a one way interface, I put one on a bit of PC board and it works great for both programming my 208h* and for controlling my 475.
*208h programming port is the right side of the audio output jack, rather than the center pin as in C-IV jacks
Rick Mann wrote:
Does anyone have pinouts for the Icom IC-910H's C-IV port? I'm hoping to fashion a USB-to-serial adaptor for it, rather than buying Icom's expensive little box. I'm concerned, though, because it looks like it uses a mono plug, so I don't know exactly how it communicates.
TIA, Rick
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