Cogito wrote:
Pelliott321 wrote:
Me too
to err is human and I am very human
There is a saying in Engineering, "If it works the first time, you obviously did something wrong."
With every failure experienced is at least one lesson learned, or re-learned if forgotten.
In this case, the re-learned lesson is that a capacitor is capable of not just failing, but failing shorted!
About 12 years ago a 4.0uF 250V Multicap used in an output coupling position of a crossover (150V at its input), going to the input of a Hafler DH500 failed shorted.
I'd replaced the Mylar input caps of the Hafler with bipolar Black Gates, rated 50 volts. The Black Gates passed the DC right along. Nearly fried one of my speakers.
David Berning told me something I didn't know then: when over-voltaged, an electrolytic cap can pass DC.
Those caps are still in my possession, and they test fine. Yikes!
Stuart