After building the 20m QCX I checked voltages and at that time I was reading ~1.70 on both CLK0 & CLK1.? Last night, I was troubleshooting another problem and decided to re-check the voltages and noticed CLK0 was ~1.70 BUT CLK1 was 0!? I haven't yet hooked up my scope but I am assuming something is holding down CLK1 or I have a failed IC.? I notice on the schematics (Rev 1.10) that CLK1 is produced by IC1 p9 (SI5351A_MSOP) and CLK1 is shared with IC4 p2.? My worst-case scenario is a faulty IC1and/or IC4.? If IC1 requires replacement, is this a programed IC?? If so, where do I order one from?? Any luck getting the IC4 (FST3253)?? Hopefully after I pull out the scope I'll have a better idea of what's going on.? If anyone has answers I would certainly appreciate a reply.
73 John KF6QPC
