On Sat, Sep 4, 2021 at 10:35 AM Rob Jarratt via cctalk <cctalk@classiccmp.org> wrote:
> I lifted it to measure its capacitance and ESR. It measures about 80uF and With a lot of capacitance meters, a leaky capacitor will read high. So that may explain why it's reading 80uF > the ESR seems OK. I am unsure whether to replace it, and if so what voltage > rating should I replace it with? I don't understand if this is a 30V rated > capacitor or 20V. It seems that Unibus has some 20V signals, so I guess 20V > might be right? I don't think 30V or 20V parts exist though, so I would need > to get 35V or 25V. Maybe the voltage rating isn't too critical? In general you can always replace a capacitor with one of a sensibly higher voltage rating if there's space for it. It's the maximum voltage that the capacitor will stand before it breaks down and passes DC. In other words, a 35V or 63V one would be fine here. -tony
