Gentlemen,
I have a mountain of vintage scopes to fix up (mid 1970s onwards). Most if not indeed all seem to be suffering from problems with the power supply section. These were manufactured at around the time SMPS was taking over from linear, I would imagine, so before they ironed out the bugs in the early SMPS designs. My question is, what were the design flaws in the early power supplies that led to premature failure and have these issues now been successfully resolved in the switchers we see in test equipment today.
Thanks,
cd.