[HAM] Leslie 25 - Electrolytic goes PFFFT!!

[Alan Alsobrook]

This may sound silly, but make sure you put the diode in correctly. I 
don't remember the rectifier circuit in that cabinet off the top of my 
head, but for a new filter cap to blow typically you are looking at 
either reversed polarity, or unrectified AC getting to the cap. Other 
suspects include a bad transformer (shorted primary turns) that could 
cause the output voltage to go higher than it should be. Just be careful 
checking & testing this is a high voltage circuit and does "bite back!"

David Damroze wrote:
> The booster amp keeps blowing fuses. So , I replaced the power tubes and
>   a bad diode.  Fuse still blew.
>   I noticed a cap with an electrolyte leak - 45 mfd 450 V - replaced it.
>   Hooked the Leslie up , turned everything on and the tubes start 
> glowing - cool , I think.
>   I hit a note on the organ and I here a PFFT sound and white smoke 
> billows from the amp.
>   I hit the switch on the power strip and open the window.
>   Inspection shows the new cap blown .
>   What to check next ?
> 
>   David D.
> 
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-- 
Alan Alsobrook CSRE AMD CBNT
St. Augustine Fl. 32086 904-829-8885
aalso at Bellsouth.net