Ah thanks. And yet the best knowledge was the engineers at Ten Tec who designed all this stuff in the first place. I just piece it together with parts swaping and guess work and I try to leave a bread crumb trail to help those who may follow this path. Probably YEARS later someone will discover this video and need to know this stuff. Ten Tec outlines HOW this stuff works in their service manual for the Paragon. Reading the manual about the PLL and VCO I do admit is it is very complex and I do not totally understand it and do not understand WHY it was so complicated. What is interesting is the PLL chips on the minor and major loop boards are similar circuits somewhat. I almost destroyed the VCO oscillator on the minor loop trying to remove the metal cover on it. I am just GLAD I got it working now and just put the bottom cover onto the minor loop board - ( it is a shield cover ), soldered that on and closed up the rig over those three boards. Closed the tomb and may they rest in there ( and of course operate and do the PLL thing ) in peace....