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I once needed a powersupply to charge the battery in my "trainset". I made my own out of parts salvaged from some 30 KW transmitters. It ended up being a 3 phase 75amp 12/24v supply It is still in the old garage unused for 10 years. Used it to start the car a few times.
By the way the train drew 40 Amps at 24 volts.
Barry
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