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RE: Fixed! Yay!

Posted by Sherwood Forest (A) on November 25, 2014 at 18:46:17

In Reply to: Fixed! Yay! posted by FenderLover on November 25, 2014 at 18:27:45:

Cool, thanks for the followup. 120hz hum was the dead giveaway, good on ya for being able to tell the difference from 60hz hum. Most people get that wrong.

So, haven't looked at the schematic, but I'm fairly sure that the cap that failed would have had a resistor or two in front of it, and that it's one or two caps from the first filter stage. As such, the amount of current that it could leak was somewhat limited, and it probably didn't contribute all that much to your inrush situation. Unless the tranny "just does that" when it inrushes, if you want to rule out a cap as cause, pay most attention to the ones with the least resistance between them and the diodes; the first filter section really. Couldn't quite tell from your post if you replaced them all or not... Sounds like you got a bad batch of caps there...

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