Hi,
I will look into to that opportunity, thank you.
Have to consider the LIF consequences in this case, if file names, LIF is not easy File system, or very simple compare with FAT, and so on is a problem. HP 16500a in not on comply official list, but test have been done with by users as I know until now.
I consider to convert to B version or measure the the transistor from the correct drive in the curve tracer. With that find a transistor good enough. I might do that in any case, time will solve it.
It's still an old system with problem with drive and strange behavior of cable location. That problem totally disappear for me if you keep the drives outside the box, CSR problem disappear. I spent a lot of time with that.
I bought this unit for my memory of state analyse in the 80th with 8085 and it end up with totally spending my time on "possibilities" . I will not go to in every detail high voltage cable to close to the cover that made the unit reboot every time I put my hand on the top cover. But just push the cable more into center of the box it that problem disappeared. And so on..