Hp e3640a

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  • Rob Northen
    Senior Member
    • Jan 2010
    • 137
    • Denmark
    #1

    Hp e3640a

    I just boght this PS used. It seems to be a quite nice unit.
    I replaced 3 Samwha caps in it, eeek!
    My question is, there are a few UCC SXE and KMG caps in the unit too, that i want to replace, due too their age. I don't have any caps to meet their ESR values, only some that are lower, Panasonic FM.

    Do you think it would be ok to use those ?
    There are no inducters connected to them, so my first thought that it is ok.
    Tags: None
    • PeteS in CA
      Badcaps Legend
      • Aug 2005
      • 3579
      • USA, Unsure of Planet
      #2
      Re: Hp e3640a

      The FMs might be "too good", and cause oscillation. Nichicon PS series or PM series should be closer, and if those aren't good enough, then the PJ series should be about right. Re the lack of inductors, this lab supply might be linear-regulated, and linear regulators don't need output inductors.
      PeteS in CA

      Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
      ****************************
      To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
      ****************************

        Comment

        • Rob Northen
          Senior Member
          • Jan 2010
          • 137
          • Denmark
          #3
          Re: Hp e3640a

          Thanks Pete!
          I also thought they there where a reason for them to choose two diffrent series of caps, and not just for fun.
          And yes, it is indeed a linear PSU. Could you tell a little more about the oscillation. ?

            Comment

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