Thank you
Images are attached,
Schematic: the NAND gate is powered from 5V and Gnd, the signals feeding in to it aren't shown. The load is an LC tank consisting of a PCB coil (L) and a capacitor, when this is in resonance it is used for wireless "power transfer", transferring a smal amount of power to be reflected off the geometry of some carefully shaped rotors as a type of angular resolver. C3 and C4 as well as the 56R resistors are there to serve to prevent any high voltages generated in the LC tank at resonance causing ripples or spikes on the power rails, they may be excessive for the task and somewhat inefficient but they do work. That string of diodes (to be replaced with an appropriate zener facing the other way in future versions) and the stuff righward of it is only there incase component variation means one gets really utterly perfect resonance in the LC tank, in which case it is there to take away any higher voltages which might threaten the transistor well before they get serious, as the resonance isn't quite perfect the peak voltages around the LC tank are under 8 volts and never quite get clipped by the diode string.
O-scope images: One shows the waveforms when R2 is present, the other shows how the base stays high (transistor never turns off, and though not shown in traces here the collector never gets pulled down so all one gets in the LC is a DC current through L) when R2 is pulled out so there is "infinite" resistance (or anything large enough, performance gets bad for R2>470 ohms) from the base to ground. Yellow trace is at the NAND gate's output pin, blue is at the transistor's base pin, note the different voltage scales on the channels. I've been making those scope measurements using scope probes with the hook covers taken off so the needle pin can go stright in to breadboar, and with little wire loops round the probe end for grounding rather than the long grounding clip, else I get ringing on the edges.