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Article #5125Re: question about computer power supply
From: Geoff McCaughan
Date: Tue, 17 Jul 1990 04:17
Date: Tue, 17 Jul 1990 04:17
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In article <4924@uafhp.uark.edu> hbj@uafhcx.uucp (Bernard Johnson) writes: > >I recently bought a NCR PC-6 power supply to power some hobby projects. When I >received the supply, I measured the outputs. The +12V line measured +4.95V >and the +5V line measured +4.8V. I have been told that the +12V line will not >be +12V until a load is connected to the supply. I was told that the scheme Sounds like you have a normal SwitchMode PSU. Normally these need a minimum load in order for the regulation circuitry to operate, many have overload and underload protection. I once had an SMPSU (from an I*M peecee as it happens) I was using to power a Hard Disk. It would spin the drive up, but once the initial load dropped off it would underload and switch itself off. Adding another drive fixed that problem. -- ------------------------------------------------------------------------------- Geoff McCaughan Email: geoff@actrix.co.nz Phone: +64 3 539545 or 852101 Amiga/Hardware/Unix/Quantum Mechanics Hacker Phax : +64 3 539567 "Anarchy: Think of it as evolution in action." ^ NEW ZEALAND!
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!comp.vuw.ac.nz!am.dsir.govt.nz!dsiramd!actrix!geoff From: geoff@actrix.co.nz (Geoff McCaughan) Newsgroups: sci.electronics Subject: Re: question about computer power supply Keywords: computer power supply Message-ID: <1990Jul17.041755.28225@actrix.co.nz> Date: 17 Jul 90 04:17:55 GMT References: <4924@uafhp.uark.edu> Organization: Actrix Public Access UNIX, Wellington, New Zealand Lines: 20 Summary: Sounds like a normal SMPSU to me