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Jacob's ladder?

  • sheepish Top 10 Forum Poster Saturday, May 12, 2018 1:57 PM Reply

    @desolder are you still around? Would this be suitable for making a Jacob's ladder?


    High pressure discharge distance between: 10 mm - 20 mm


    That seems very short for 400 kV. Or is that how far apart the narrow bit of the Jacob's ladder could be?


    Is it a little crazy to have 400 kV outputs millimetres apart? I suppose the wiring insulation is better than air.

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  • gasbag11 Top 10 Forum Poster Monday, June 18, 2018 11:29 PM Reply

    I'm wondering if maybe @desolder didn't get your PM due to some UPgrading (lol) that DX may have been doing at the time, like the missing email notifications from forum replies that have been happening occasionally for a while now?

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  • desolder Top 10 Forum Poster Wednesday, June 20, 2018 3:27 AM Reply

    Ugh I thought I replied, but it somehow didn't post. Anyway....


    In order to start the Jacob's ladder you need 30KV per cm of air gap at the bottom of the ladder. In theory this should jump a 13cm gap, which is larger than any Jacob's ladder I've seen.


    I looked up the breakdown voltage for silicone insulation. The source I found said it's about 22KV/mm. So if this is really capable of 400KV, then the insulation thickness should be more than 9mm thick to prevent a spark across the crossed output wires. Obviously these wires don't look like they have 9mm thick insulation. So you'll need to keep the wires apart to prevent a spark from jumping across them.

    What's up with the scrubbed LED driver IC markings?
    What are they trying to hide?

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  • sheepish Top 10 Forum Poster Wednesday, June 20, 2018 5:49 AM Reply

    "Kelvin-volts"? :P


    The wires come out of the device very close to each other. I think it's another Chinese device defying the laws of physics.

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  • gasbag11 Top 10 Forum Poster Wednesday, June 20, 2018 5:59 AM Reply

    like the missing email notifications from forum replies that have been happening occasionally for a while now?


    Still happening! I got an email from your post sheepish, but not from desolder's. 


    Btw, good to see that you're still with us desolder.   

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    post edited by gasbag11 on 6/20/2018 at 5:59 AM
  • desolder Top 10 Forum Poster Wednesday, June 20, 2018 6:42 AM Reply

    Yep, I'm still alive LOL :)

    What's up with the scrubbed LED driver IC markings?
    What are they trying to hide?

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  • gasbag11 Top 10 Forum Poster Wednesday, June 20, 2018 7:08 AM Reply

    And this time I did get an email from desolder's post above. :/                      






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    post edited by gasbag11 on 6/20/2018 at 9:33 AM
  • sheepish Top 10 Forum Poster Wednesday, June 20, 2018 8:31 AM Reply

    And I got an email for gasbag11's second post just now, not his first one.


    Yep, I'm still alive LOL :)


    Cool. There's still a bit of life left in DX.

    DX has found a new way to deceive customers:
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    by the person who wrote the review.
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