2 Mar
2009
2 Mar
'09
10:50 a.m.
That's not necessarily a flaw: 120/240 supplies
often do the voltage selection
by switching the circuit between bridge rectifier for 240V and voltage doubler
for 120V. In the bridge config two caps end up in series, so 250V+250V=500V.
For the mains smoothing capacitors (large electrolytics after the
rectifier stage), sure. But for the mains filter capacitors
(non-polarised, connected acrsso the mains or between one side of the
mains and ground, before the bridge rectifer), I doubt it.
-tony