I think you take the two capacitors value in series + strays to determine the actual load capacitance that the crystal sees, so 2 18pf = 9 pf, so close enough.
Lefty
I think you take the two capacitors value in series + strays to determine the actual load capacitance that the crystal sees, so 2 18pf = 9 pf, so close enough.
Lefty