[wellylug] 2nd blown up powersupply

[Bret Comstock Waldow]

On Sat, 16 Apr 2005 20:22, Tony Wills wrote:

> Strangely enough the PSU is pretty clean, no layers of dust, no bursting
> capacitors (no spider webs :-) - postmortem on second supply shows damage
> in the same area, same coil damaged and the top blown off the one IC on the
> board (TIP221P rated for 230V+/- 15%, switches the AC input).

A hypothesis, based on speculation.

This is a rather damp place.  A PS that's running stays warm, and doesn't 
build up any moisture through the laquer, etc, but a stored one...

Corrosion, breakdown of insulators, partial shorts?

Cheers,
Bret
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