> > > I looked in Radio Shack, at some step-down transformers for

The very cheap one ('for heating appliances only') is probably a triac circuit. Like a lamp dimmer fixed at half-brightness. And that one

step up, of course. Don't use that for anything but heaters/lamps. I've seen the result of plugging a Mac+ into one of those, and it wasn't pretty. It took me a long time to rebuild the analgoue board. If the owner had asked me what to do in the first place, I'd have simply cut

link... The true transformers can be used as a step-up unit. But owing to

etc, you may not get the output voltage that you expect (it will, in general, be lower than you'd expect). But it should work. You may find it's cheaper to buy a bare transformer and add the case/connectors yourself. BTW, another trick which I hesitate to mention because it can casue damage is the following. If you _know_ it's a switch-mode PSU, and that the first thing it does is rectify the mains, and there's no line-frequency transformer to provide a startup voltage, then it'll run on DC, right. So give it DC at peak voltage of the 220V mains it's expecting - i.e. at twice the peak voltage of the local mains. Make an external voltage doubler to do this. I don't want to give more details, because IMHO if you can't work it out from that, then you probably shouldn't be doing it. Even if you do know what to do, examine the PSU carefully to make sure there's

that depends on an AC input. -tony