When I left technician land years ago, we would call it shotgunning. It had about a 10% success rate, just for replacing a failed part. I gave up that approach quick. Another thing I learned when trying to troubleshoot closed loops is that components that affected loop lock and noise the most were typically not the problem components. if this is not understood, then use of freeze spray and heat guns can easily lead one astray.
Does this circuit even have temperature compensation feedback? How does the basic design (block diagram) differ from the references (whatever radios people are using as their holy grail of stability, what? a 148?)
not trying to mislead or misinform
I understand; that wasn't leveled at you C2; meant for the Galaxy engineers..
Just borrowed your points - is all.
Sorry for the misunderstanding.
UJ ceramic caps - by design and intended function/use - is to compensate:
http://search.murata.co.jp/Ceramy/image/img/A01X/G101/ENG/GRM0333U1H6R0DD01-01.pdf