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8223Re: [SeattleRobotics] Bench Power Supply

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  • Benoit Provost
    Sep 2, 2001
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      I also have a switching power supply that I wanted to use as a bench-top,
      general purpose power supply. Somebody suggested to add a load to it, but I
      could not keep it stable. Maybe the load has to be quite near the value for
      which the power supply was designed? When I turn on and off my application
      load repeatedly, the power-supply goes in power-protect and shuts off.

      Benoit

      ----- Original Message -----
      From: "Dan Creagan" <dcreagan@...>
      To: <SeattleRobotics@yahoogroups.com>
      Sent: Saturday, September 01, 2001 8:05 AM
      Subject: [SeattleRobotics] Bench Power Supply


      >
      > Computer power supplies are switched and require a load. Has anyone
      > configured one as a bench supply, and if so, what are the tricks and
      traps?
      > If I build a box, put a constant load on the different outputs, and use it
      > for electronics, do I need to provide any other filtering? What would be
      an
      > appropriate load?
      >
      > Links that I've found:
      >
      > http://server.redden.on.ca/~tcarc/switcher.html This looks like it would
      > work for our hobby. Anyone done this?
      >
      > I know I can just do this and experiment, but I want to get in the
      ballpark
      > first time ... honeydo's in the new house won't let me spend a lot of time
      > experimenting (at least initially)!
      >
      > Dan
      >
      > PS: I'm grown up and understand that voltage hurts. No need for safety
      > warnings unless, of course, you try this yourself. In which case,
      remember -
      > voltage hurts. There are several hundred DC volts inside a computer power
      > supply.
      >
      >
      >
      > -----Original Message-----
      > From: Brian Short [mailto:k7on@...]
      > Sent: Saturday, September 01, 2001 9:14 AM
      > To: SeattleRobotics@yahoogroups.com
      > Subject: Re: [SeattleRobotics] Tektronix 466 or 468
      >
      >
      > I am partial to the '465 and 466 models - the 466 has the
      > "storage" facility, i.e. it is also a storage scope.
      >
      > Currently, I have the '466, but actually I was looking for a
      > good '465 or '465B at the time.
      >
      > I spent 6 years in the Navy prior to College/Grad School
      > as a Data Systems Tech and always had a 465 at the
      > ready. Some procedures would require the 466 and it
      > was available as needed.
      >
      > These are 100MHz dual trace, delayed sweep scopes
      > and are of high quality, though they have been around
      > awhile. In my mind, they are a great buy!
      >
      > I can't speak for the surplus market of later model units.
      >
      > Also, I'd only purchase one through a reputable test
      > equipment dealer (like in Nuts N Volts). I purchased
      > a couple at a defense contractor auction one time and
      > it is possible for them to have problems not worth the
      > expense of fixing or to have ancient calibration records.
      >
      > Anyway, my advice, get a 465b - you'll love it.
      >
      > My 0.02USD, Brian
      >
      > At 09:35 AM 9/1/01 -0400, you wrote:
      > >Any one familiar with Tektronix 466 or 468 scopes? I am looking at
      > >these and the Tektronix 76x3 series.
      > >
      > >I know they are 100mhz dual channel storage scopes. Do you recommend
      > >them for hobby etc? How do they compare with the 76x3 series.
      > >
      > >Doug
      >
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