[time-nuts] Re : Favourite DC power Supply

Don Collie jnr merdon at xtra.co.nz
Sat May 3 14:00:41 EDT 2008


I managed to turn a couple of 5 Volt 100 Amp SMPS into  13.8 Volt 100 Amp ones, by reforming the output filter cap to 16 Volts, and increasing the duty cycle from 0.4 to 0.8. 
    They were made by Pioneer Magnetics, and had the spare grunt to do their new job [or else I would have set the current limit to 50 Amps]. Only problem was they each needed a 5 Amp bleeder load, otherwise the switching frequency came down into the audible range.
    Tried putting both in parallel once, and connecting their output to Dads welding setup, but there wasn`t enough
back EMF to strike an arc! :-).................................Don C.

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