Hi
Trying to sort some lamp holders out and, don't know how, but have managed to blow the lamp output 7 on Z2 flip flop. At least i think it is just the transistor. The Lamp glows dimly but does try and flash when it is supposed to, so i suspect mr Flip flop is okay for now. I checked Q8 and it tests out differently to all other transistors for neighbouring lamps with the field wiring disconnected. I have not removed from the PCB though.
The transistor is a NPN MPS-A13.
I do have a couple of transistors, will any of these work correctly: -
2N 4401 GE752 and a 2N 3904 T052.
If the above wont work, what is the modern day equivalent please?
Also how does one figure out an equivalent transistor?
Cheers
JB
Trying to sort some lamp holders out and, don't know how, but have managed to blow the lamp output 7 on Z2 flip flop. At least i think it is just the transistor. The Lamp glows dimly but does try and flash when it is supposed to, so i suspect mr Flip flop is okay for now. I checked Q8 and it tests out differently to all other transistors for neighbouring lamps with the field wiring disconnected. I have not removed from the PCB though.
The transistor is a NPN MPS-A13.
I do have a couple of transistors, will any of these work correctly: -
2N 4401 GE752 and a 2N 3904 T052.
If the above wont work, what is the modern day equivalent please?
Also how does one figure out an equivalent transistor?
Cheers
JB
