I am trying to recreate this circuit based on this patent located here: https://patents.google.com/patent/US3989042
I tried this circuit with the following components:
R1: 1K (Though I tried a 10K pot from 10k to the point of it blowing up)
TD: 20mm Piezo with resonate frequency of 2.4MHz ~100KHz
C2: I tried a few different values, 33nF, 1.2nF, 100nF, 10nF, 47nF
The circuit will suck down plenty of current but is not oscillating, any help would be GREATLY appreciated!