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Switching power supplies question.
The "higher voltage" is usually on the line side of the isolation transformer. You would create a safety hazard by accessing that voltage. Joe Leikhim K4SAT "The RFI-EMI-GUY"© , Pshaw I used to make a living fixing TV sets that ran off of the mains wit no isolation. Needless to say there were millions of these TV's back in the day, The trick was to use half wave rectification. You can do the same thing with a PC supply. Instead of using an AC input you would half wave rectify the AC and and a suitible filter capacitor to make up for the frequency change. Also you has to use the neutral as ground, and use a polarized plug in the USA, Now it's true if the wall outlet got wired the wrong way you could be in for a treat of epic proportions. So a GFI would be in there somewheres to protect you. Then your HV DC ground will be at neutral. At which point you could use a Voltage multiplier to get close to any whole number multiple of the mains voltage. Now it's true you you may not get away with this trick on 3 phase or split phase 220 mains, because then where is the neutral? 73 OM n8zu |
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