[Jukebox-list] Explosions-was-electrolytic caps

[John Robertson]

Karl wrote:
> Ron,
>
> Saw one....in the same place....scared the begeebers outta me. That 
> thing sounded like a shotgun going off and filled the area with 
> smoke!!! I was lucky too.....30 seconds earlier I had my face down 
> there looking for broken wiring.
>
> Karl
> Columbus Coin-Op Shop
> 2061 S Lumpkin Rd
> Columbus, GA 31903
> (706) 507-2963
>
I tell my staff to stay away from an amp/monitor after a recap - give it 
ten minutes powered up and then turn it off. Next check to feel if any 
cans are warm or hot to the touch...a certain indication that it is in 
backwards.

John :-#)#
> ----- Original Message ----- From: "Ron Rich" <ronnnrich at yahoo.com>
> To: "Jukebox mailing list" <jukebox-list at lists.netlojix.com>
> Sent: Friday, February 01, 2008 4:11 PM
> Subject: Re: [Jukebox-list] Explosions-was-electrolytic caps
>
>
>> Speaking of "spectacular explosions", has any one ever seen a 
>> "paper", or "tubular" condenser explode ? I once saw the .1 on the 
>> front of a Seeburg mech blow up, and I have seen a couple of mech 
>> covers damaged by that happening--but never anything else. Ron Rich
>>
>> Jay Hennigan <jay at west.net> wrote:   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. :-)
>>
>> -- 
>> Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
>> Impulse Internet Service - http://www.impulse.net/
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