Page 2 of 2 FirstFirst 12
Results 11 to 13 of 13

Thread: Plasma Globes

  1. #11
    Join Date
    May 2007
    Location
    Authentic Asian food area of SoCal
    Posts
    2,388

    Default

    @Steve,

    Would something like this be easier? Just a glass tube with some electrodes?

    http://strattman.com/lightning_tube

  2. #12
    mixedgas's Avatar
    mixedgas is online now Creaky Old Award Winning Bastard Technologist
    Infinitus Excellentia Ion Laser Dominatus
    Join Date
    May 2007
    Location
    A lab with some dripping water on the floor.
    Posts
    9,043

    Default

    Straight tubes are infinitely easier. I can use stock electrodes with them and easily bake them in a tube oven.

    Dalibor's videos make it look easy... Merely getting the materials costs a fortune. It took me years of searching for sources of the three special glasses with controlled expansions that you need to get from a nickel/iron metal rod to Pyrex. The stuff retails at 200-300$ per pound of glass, minimum order of one pound of each type.

    Leaded glass appears easier for glass to metal seals, but it also is far easier to break and does not like high temperatures, like bakeout sessions. When you use it, it can turn black and liberate free lead at sealing temperatures unless you are very careful. Dalibar went out of his way to get the right custom materials for a leaded glass stem seal. He considers the material sources a trade secret, and rightly so. It probably was far easier in the FSU/Eastern Europe to do so then in the US.


    Steve
    Last edited by mixedgas; 12-07-2018 at 12:30.
    Qui habet Christos, habet Vitam!
    I should have rented the space under my name for advertising.
    When I still could have...

  3. #13
    Join Date
    May 2007
    Location
    Authentic Asian food area of SoCal
    Posts
    2,388

    Default

    Quote Originally Posted by mixedgas View Post
    Straight tubes are infinitely easier. I can use stock electrodes with them and easily bake them in a tube oven.
    Even better. I will contact you around the beginning of the year to discuss tube length, color (based on what gasses you have on-hand), recommended HV drivers (if you know of any), and of course pricing.

    Dalibor's videos make it look easy... Merely getting the materials costs a fortune. It took me years of searching for sources of the three special glasses with controlled expansions that you need to get from a nickel/iron metal rod to Pyrex. The stuff retails at 200-300$ per pound of glass, minimum order of one pound of each type.

    Leaded glass appears easier for glass to metal seals, but it also is far easier to break and does not like high temperatures, like bakeout sessions. When you use it, it can turn black and liberate free lead at sealing temperatures unless you are very careful. Dalibar went out of his way to get the right custom materials for a leaded glass stem seal. He considers the material sources a trade secret, and rightly so. It probably was far easier in the FSU/Eastern Europe to do so then in the US.
    I have found that the more casual a person is about doing a complex task, especially one that takes finesse, no more difficult it is. You can tell Dalibor has honed and perfected his craft. This is not even mentioning how long it probably took him to source his materials. Even more so when confirmed by you, who has been in the business for a very long time.

    Anyway, thanks again, Steve. This is no-rush so, if your projects have you backed up, please don't make this any kind of priority.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •