Mike,
Thanks very much! This may not be exactly what you envisioned, but I'm sure it is close. Regardless, it now functions perfectly (my original design would never turn off the red LED).
I've attached the full schematic. It is a voltage monitor using a single LED indicator that lights...
Thinking further about what you said, I'm not sure that your proposed action is what I need functionally (or maybe I don't understand). To reiterate, the LED is to be OFF above 11V.
I'm using Q1 as an inverter; when it is on, I want Q3 off (and the reciprocal). So I don't want to pull the Q3...
Your opinion, please. Does one of the two variations of this circuit offer a clear advantage, or is it a wash (see attached)?
This indicator circuit turns on the LED below 11V (set by the zener). The LED cathode must be at ground (it is actually part of a tri-color LED with a common cathode)...