/diy/ - Do It Yourself

>>1274566
Both D4 and Q7 will get damn hot at 24V methinks. That is because the circuit has a structural problem: you cannot further pull down the voltage at the base of Q6 because that would kill its base-emitter junction which acts as a z-diode for reverse voltages of more than 7V and the emitter is at about 18V. This leads to the weird values for R11 and R12 which also depend on the actual current gain of Q7. Not good. I would prefer the classic push-pull configuration which has no such problems.