reversed my power leads - how much damage did I do?

[ethrbunny]

How much reverse voltage / current does it take to damage an electrolytic capacitor - say a 10uF 25V piece? Will it look any different when its 'bad'?

How about a TL074?

Yep. You guessed it. I got my power leads switched. Now Im trying to puzzle out how much damage I did.

I ran 9V the wrong way.

[R.G.]

Just hook it back up the right way. You might have gotten away with it. Momentary reversals are not instantly fatal.

If it doesn't work, just replace all the electros and the ICs. Bipolars and diodes are probably OK.

Electros die if there's too much reverse current through them - as you knew - but there's no good way to tell how much each one would take. Opamps vary in their sensitivity, too.

I guess I might decide what to do on the basis of intended use. If I was just using it for home playing, I'd just repower it and go on if it worked. If I depended on it playing in public, I would replace all the possible damage, because I don't want latent defects surfacing while I'm on stage.

[ethrbunny]

The circuit in question (commonsound  phaseur) is acting rather oddly now so I probably did some damage. Time to start replacing things.

Thanks for answering my post RG.