[Icom] Computer keying of Icom 751A using K1EA CT Software

[W0YG Charlie Summers]

Never had a problem making up a cable for keying a rig before but the Icom
751A is giving me a bit of a problem.  I made up both a serial and a
parallel cable yet both produce the same results, unintelligible CW!  The
Icom key input wants to see a three part plug with ring and tip connected to
the keying circuit.  When I hook the computer to the rig and attempt to test
a buffer, this is where the problem starts.

Anyone out there seen this before?

73,

Charlie, W0YG..>>