[ICOM] CT-17 dc power jack size

[k2cb at comcast.net]

Anyone know the actual size of the dc power jack on the Icom CT-17?   Is the inner diameter 5.0 or 5.5?  Inner diameter 2.1 or 2.5?    I need to order some dc barrel cables and want to make sure I get the correct size. Rather than guess, I'd like to get an exact fit.   The CT-17 manual references an OPC-012 cord or BC-25/27 wall cube, but there are no specs to be found on any of these via Google......... 
  
Thanks 
Eric 
K2CB