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Hi Tom, Not sure what 'standard' means in this context. The answer is some do, some don't. The big giveaway is the weight. If it seems astonishingly light, then there is no conventional transformer therein. I have a quantity of 'surplus' 200VA transformers which could be doubled or trebled up to deliver 500VA. What volts and amps do you require? Does it need smoothing? What would it power? Motors, lamps, electronics, something else? Give me a bell and we can sort out the details. Regards etc, Ray. >---- Original Message---- >From: madtom1999@xxxxxxxxxxxxxx >Date: 06/09/2013 8:13 >To: <list@xxxxxxxxxxxxx> >Subj: [LUG] Power supplies - do they have transformers > >Do the standard pc power supplies have a transformer in them. Just >wondering as I found a 500W job for Â12 and I cant get a 500w >transformer for anything like that >Tom te tom te tom > >-- >The Mailing List for the Devon & Cornwall LUG >http://mailman.dclug.org.uk/listinfo/list>FAQ: http://www.dcglug.org.uk/listfaq > -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq