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Old 15th Jul 2021, 12:31 pm   #1
DonaldStott
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Join Date: Aug 2015
Location: Glasgow, UK.
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Default Understanding Dual Can Electrolytics

Currently restoring a Bush DAC10 and as part of that I removed the Dual Can Electrolytic for testing out of circuit.

In the past these have been replaced if excessive hum was present but in general those in both the Bush DAC90A and DAC10 have been fairly resilient, certainly good performers for their age!

The dual can in these sets are 32μF / 16μF and I'm looking to understand when the measured values are indicative of problems? I appreciate that there are those that would encourage capacitor reforming but not sure when that would be a viable option?

What I have for the 32μF is:-

52.75μF
ESR : 1.0Ω
VLOSS : 1.8%

And for the 16μF:-

49.1μF
ESR : 1.7Ω
VLOSS : 4.2%

All measurements done with my MK-328 Tester - not the best I know!

Not sure what those numbers are telling me but more than happy to be enlightened - thanks in advance.
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