[sdiy] Unusual transistor failures

[Neil Johnson]

> I can obviously repair this, but in my experience that is a most unusual
> failure mode for bipolar transistors - I would expect them to go short B-E
> or C-E under fault conditions, blowing at least the fuse and possibly other
> stuff too. I feel a bit uncomfortable not knowing what went on.

Bond wires are fuses too!

If they're in TO-3 packages the you could always cut off the top and
look inside.

Neil
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