Smoke on the Horizon... oh s**t!

From: John Honniball <>
Date: Mon Feb 16 13:55:14 2004

Robert Maxwell wrote:
> Then something (it used to be a tantalum cap) caught fire.
> Unplug again. The former capacitor was the input filter on the 7812

Well, just in case you thought HP was infalliable, I've had this
sort of thing happen on an HP 1980B scope. Tantalum capacitor, dead
short across a 15V supply. The supply went into current-limit, and
the scope just sat there.

Oh, and I had another tantalum fail in a Arp Omni music synthesiser.
There was one cap across each key, and when they failed, the note would
sound continuously.

So, I'd say it's a normal aging process for tantalums!

John Honniball
Received on Mon Feb 16 2004 - 13:55:14 GMT

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