Sorry, been up to my elbow in a Myford since 9am. Anyway, V(OP1) with Relay / Resistor connected. And, yes, across the resistor marked 01C (one side is ground, the other is the output from the 74HC14), the signal that drives the FET On/Off. I expect that to be either <0.5V / > 4.5V - assuming the local logic (HC14) is supplied at 5V.