Based on the post’s you referenced, I’m going to perform a “sanity check” on the LPF considering that L507 was found open.?
I can now invision a path through Q507 and the BS170’s with there being a shorted capacitor.?
I haven’t employed it yet until the simple things have been checked first. I suppose we are there! I have a 200MHz 4-ch DPO and a bench top power supply. I’ll clear the build space and stage the equipment.?
Before your last response, I was headed down the random clock signal to the gates “rabbit hole”. I see the logic in the LPF and it’s probably the culprit. There is a very good chance I have some high end RF rated capacitors and inductors in storage.?
