Well, MIDI Channel selection wouldn't be an issue for MIDI Clock. I hate to say this, but I see no MIDI Clock support listed for the A190-2 (either at this link, or found in the more in-depth manual). Now, the A190(1) certainly seems to translate MIDI Clock into a 5V gate signal (link, and manual). I hope that I'm missing something here, Alwaysnew.
You could test your connections by setting the PF to MIDI: CTRL XMT=ON. Moving a knob after putting the A-190-2 into Learn mode should give you a variable voltage out of the CV4 jack. Again, this will simply test if your PitchFactor is transmitting something, and your Doepfler module is receiving it.
… but it sure would be cool if the RESTART flex/function/footswitch in the HarPeggiator mode could XMT/RCV a Start message, Nick. 
