About cheap new Caps from Ebay and their value ?

Thread Starter

UnnamedUser159

Joined May 3, 2016
501
Hi there,
i buy new electrolytic capacitors from Ebay and from local store from my country.
If the capacitor should be 1000uf i find that it goes to maybe 970 as new. Is this normal?
I measured it though capacity meter cm9601a and cheap esr meter.
I`ve heard that capacitors should be replaced when they go 5-10% lower. What is the meaning to buy new capacitors when if i want to put CE somewhere i have to measure them(the new one) and then use second hand from my "store".
I am talking about new capacitors from local store too.
Is my new meter(and the ESR is new too) the reason or ?

Thanks in advance
 

ErnieM

Joined Apr 24, 2011
8,328
Unless you pay extra for a tight tollerance you can expect -10 to +20 or 50 or even 150% variance. Yours measures just -3% which is probably acceptable. If your meter has not been calibrated it should just be used for reference, meaning just use it for a gross check.

Cheap parts are cheap for a reason. They may be test fallout parts bought for pennies. Or a vendor just getting established who hasn't quite figured out how to make a reliable part.
 
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