A straight-forward oscillator as above, 4MHz. The two gates are the only ones used on the package; all other inputs are tied high or low as most convenient for the wiring, about half each way. The feedback resistor is 1M, the series resistor 680.
It gives a nice stable 4MHz as might be expected and takes around 800uA... but hanging a 10M scope probe on it increases the standing current to over 1mA.
Since V=IR, and the scope resistance is 10M, that implies that 2000v is being generated somewhere :shock: which it obviously isn't. A 10M resistor across the output pin and ground makes no difference to the current... so it must be the capacitance. But that's only picofarads.
Where on earth is that current going?