I breadboarded the circuit and no joy. Here are the transistors I ended up using:
TR1 = 2N3819, TR2 = NTE129, TR3 = NTE123AP, TR4 = NTE123AP, TR5 = 2N2905A
Do any of those raise a flag as something I need to swap out, and if someone could direct me toward some troubleshooting steps I would greatly appreciate it.
FYI, I do not have the relay hooked into the circuit but am testing for voltage between -12vdc and TR5 collector.
Again, thanks for all the help.
TR1 = 2N3819, TR2 = NTE129, TR3 = NTE123AP, TR4 = NTE123AP, TR5 = 2N2905A
Do any of those raise a flag as something I need to swap out, and if someone could direct me toward some troubleshooting steps I would greatly appreciate it.
FYI, I do not have the relay hooked into the circuit but am testing for voltage between -12vdc and TR5 collector.
Again, thanks for all the help.