What device is it ?

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  • bianchi77
    Badcaps Legend
    • Jun 2016
    • 1121
    • Australia
    #1

    What device is it ?

    Everyone,

    I'm wondering,
    What device is it ?
    Please have a look on the photo.
    On my meter it's 0.31 ohm...

    Is it a balun or miliohm resistor ?

    Thanks
    Attached Files
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: What device is it ?

      Just a very small inductor made by putting the wire through two FERRITE beads.
      http://www.feryster.pl/polski/bdw.php?lang=en
      Last edited by budm; 12-28-2016, 10:28 PM.
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • bianchi77
          Badcaps Legend
          • Jun 2016
          • 1121
          • Australia
          #3
          Re: What device is it ?

          ferrite bead core, ok, thanks, similar like on power supply charger bead...

            Comment

            • bianchi77
              Badcaps Legend
              • Jun 2016
              • 1121
              • Australia
              #4
              Re: What device is it ?

              @budm
              anyway I've made MC34063 running on 3Kohm RL and 220V but it's not stable..
              could it be the inductor too small ? my test is using 333 coilcraft smd inductor 33uH...
              it's releasing heat too much with in a minute and voltage drop rapidly...
              f = 40.4 KHz, I checked with scope..
              8W 220V neon bulb is very bright now...in calculation it's more than 16W with that experiment circuit..
              FET = 62N25 savage from samsung power supply unit,
              Following the formula from ST datasheet, the lower the value of inductor, the higher Iout, but I need a bigger rating of inductor ( big wire ) correct me?
              https://www.youtube.com/watch?v=0XWUl3fcuTc
              Last edited by bianchi77; 12-29-2016, 12:05 AM.

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