Maybe use the volt meter first to make sure there is no potential between either power output to ground.
From: Forrest Christian (List Account) Sent: Tuesday, February 7, 2023 7:54 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] Neg 48V Power Supply Any isolated 48V supply works, just use the + wire for your return and the - for your -48v. I'm fond of the meanwell hlg supplies. The only gotcha is that some supplies will tie the negative wire to the ground pin on the ac plug, forcing it to be a +48v supply. You can use an ohmmeter to verify that this connection doesn't exist. Measure from the ground pin to the - output without the supply powered on. Shouldn't show continunity. On Tue, Feb 7, 2023, 7:27 PM Sterling Jacobson <sterl...@avative.com> wrote: I've got a few projects where I just need a simple telco -48v power supply from AC plug. I've got a lot of the "normal" PS units lying around. But what does it take to power a -48v device? Is it something I can/should just rig from a standard AC to DC 48v PS? Or is there something out there I should purchase instead that is fairly cheap? I'm using ITC Rectifiers for my -48v plant in several areas, I just haven't built out the DC plant in all areas but have one or two units that need it already on site. -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -------------------------------------------------------------------------------- -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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