Checking capacitor values, question

goddot

Member
Messages
2,431
Is it possible to check capacitor values of an amp (just to make sure they didnt drift or are within tolerance) with them in circuit or will one leg have to be removed? thanks!
 

Jeff Gehring

Gold Supporting Member
Messages
7,671
In general, in circuit readings are not worth doing. If you isolate one leg of the cap in question, you know that your resultant data will be as valid as the test equipment you used to make the reading. Which leads to the fact that the capacitance scales on your DMM are probably not going to tell you anything at all about whether the cap is leaky or not. You need the capability to test for leakage at rated voltage to get a clear picture.
 

67super

Member
Messages
1,504
When the cap is installed you will measuring the capacitance of the circuit not just the individual cap. If you want an accurate measurement it needs to be isolated or lifted.
 

J M Fahey

Member
Messages
2,926
Leave it alone unless you have a *definite* problem you are troubleshooting.

Desoldering an pulling a leg, and then reinserting and resoldering fully qualifies as amp abuse, way more than grueling long hours of playing.

If anything, bending solid wire tends to crack and weaken it, and that´s what component legs are.
Also solder heat is way higher than even the hottest chassis, so only do it IF really needed, as while actual servicing.
 




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