[Jukebox-list] electrolytic caps

[Jay Hennigan]

CASWELL CIVIL & LANDSCAPE wrote:
> Hi, Looking at recapping an amp for the first time and need some help.  My concern is with identifying the pos and neg on the electrolytic caps.  Some have no markings and others have a solid black line at one end.( I assume this is the neg end but would rather be safe than sorry)  The amp is out of a 148 trashy.  Any help would be appreciated.

Older electrolytics usually marked the positive end with a + mark. 
Modern electrolytics often mark the negative end with a stripe and a - 
symbol.

If both wires come out of the same end of the can, the longer wire will 
be positive.

If they come out of opposite ends, the wire spot-welded to the can 
itself is negative, the wire protruding through an insulator is positive.

If you get it wrong, after the spectacular explosion, put the next 
replacement in the other way around.  :-)

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Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
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