The results are in, it is the si5351.
On the first attached sweep the chip was not cooled, the other sweeps were made while holding a frozen cotton swab against the chip for increasing amounts of time.
I started out using a frozen blueberry, but that only worked for so long, eventually the blueberry juice ran down onto the traces and NanaoVNA-Saver crashed. So I ate the rest of the frozen blueberries.
I wonder what my options are, besides buying a new H4.
Gary AG7TH
