Try buying a ready made cable here http://www.ic-r5.com/They have
stuff for the ICOM IC R-2 also
Jim

Daniel Stephen wrote:

(Cross posted)
Can anyone advise me as to where I can find the schematic for an interface
between an IC-R2 and a computer. The one I had in mind featured two
transistors and several other components. The page had construction details,
jiffy board layout, etc. I used to have the URL but I can't seem to find it
now. Your help would be appreciated.

Cheers,
Daniel