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How to remove DC from AC power line?

Discussion in 'd.i.y.' started by flashgo, Nov 12, 2013.

  1. flashgo

    flashgo DIY Practitioner

    Short of the kilo-quid required for an IsoTek Evo-3 syncro, is there a simple DIY way to remove DC from the AC power line?
  2. thommy

    thommy pfm Member

    1:1 isolation transformer? That plus RF filtering is basically an IsoTek so I've been told.
  3. flashgo

    flashgo DIY Practitioner

    RF filtering won't affect the DC, and an isolation traffo won't fit in that box on the power cable. There's got to be a trick.
  4. thommy

    thommy pfm Member

    Didn't say it would affect the DC! Just saying that filtering was another aspect of the Isotek.

    You basically want a power conditioner without having to have a power conditioner.
    Hope someone else has a better idea, I would be keen to hear it :)
  5. JohnW

    JohnW Trade: Lakewest

  6. arthur

    arthur Banned

  7. sq225917

    sq225917 situation engineer

    What Arthur says, I use two in my system, very effective.
  8. mudlark

    mudlark nearly half a clue

    Think carefully about having a 240 volt board in your DIY device. Waiting to have a great fat belt from that one. The kit should come with an enclosure of some sort and labels for the outside of the enclosure. IMHO of course.
  9. davidsrsb

    davidsrsb pfm Member

    Just like the exposed mains inside my Sony tuner and several Marantz CD players? Putting the dc blocker pcb inside its own enclosure will save you a lot of risk and would contain the capacitor contents if they failed spectacularly.
  10. sq225917

    sq225917 situation engineer

    Was anyone suggesting leaving them on the floor?
  11. flashgo

    flashgo DIY Practitioner

    Sorry to be dense, but how does the Sjostrom unit work? (Sound.Westhost is down.) Can you plug it into an outlet, and magically, all DC is removed from anything else plugged into the same circuit? Or is it built into each component on the rack, or as part of a DIY power conditioner with multiple outlets?
  12. thommy

    thommy pfm Member

    It goes before the transformer in whatever device you want free of DC. Check the specs to see if it will handle the power consumption of all of your kit at once.
  13. mudlark

    mudlark nearly half a clue

    Using these devices is not trivial.
  14. thommy

    thommy pfm Member

    This is a DIY forum. People come here to learn, exchange knowledge and support others. The OP has asked a perfectly reasonable question and a few of us are trying our best to help him.

    You seem to be intent on preventing him from learning anything. I think we all know that mains voltage is dangerous. You may have been unlucky enough to electrocute yourself in the past, I don't know, but that doesn't mean that everyone who asks a question about mains is a cretin. We all start somewhere. IMHO.
  15. thommy

    thommy pfm Member

    Thx for the heads up on the sjostrom boards. I have built several of his regulators, not sure why I didn't spot these before.
  16. S-Man

    S-Man Kinkless Tetrode Admirer

    Electrocute - death by electric shock.

    Sorry to be pedantic, but I'm not sure he would be contributing (debatable?) to this thread if he had been electrocuted.

    For some members of the Audio room, yes. :)
  17. Bemused

    Bemused What's this all about then?

    When you have an ignore list not all the threads make sense :D
  18. thommy

    thommy pfm Member

    Woop Woop! It's the sound of da [dictionary] police ... LOL

    Never knew that, thanks for correcting it and therefore expanding my vocabulary :)
  19. thommy

    thommy pfm Member

    Ah so I wasn't speaking out of turn then. Good to know.
  20. sq225917

    sq225917 situation engineer

    flash, it's just like magic.....

    The diodes block the DC,

    I have mine plugged into a socket and then half an IEC cable runs from each one to a component. You could box them up if you cared enough.

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