Regarding question number one. Might it not be possible to hold the adjacent cathodes just below their ignition point and thereby lower the voltage between the lit cathode and the adjacent cathodes? With micro processor control, I would think that just about anything would be possible.

Ira.



On 12/1/2024 8:05 AM, martin martin wrote:
Have you been yo Dalibor’s site ?  He may be the modern expert at Nixie design. He will certainly answer your questions.

[email protected]


On Sun, Dec 1, 2024 at 07:58 HikariFaith <[email protected]> wrote:

    I have a few niche questions related to the making of nixie tubes
    I can't seem to find definitive answers to anywhere. I have a
    feeling someone here would be able to help me figure them out.

    1. I understand that the cathodes need a certain amount of
    separation to prevent arcing, but has anyone tried alternative
    methods of cathode production in an effort to make that space
    smaller? The two that immediately come to mind are sputtering
    tungsten coatings on an insulating material and the inverse of
    that, which is coating the back of the tungsten wire with an
    insulating material. I had also been wondering if it would be
    possible to prevent arcing some other way.

    2. When working borosilicate during the tube construction, how hot
    do the components inside get? I'm thinking both in terms of
    components directly touching the heated glass and those not
    touching (including indirectly). I'm asking to figure out what
    thermal tolerances I should look for in materials used to make a
    nixie tube.

    3. How thick are the walls of a borosilicate nixie tube? Ideally,
    I'd have as specific an answer as possible.

    4. Why haven't new manufacturers of nixies made any top-view
    nixies like the IN-12?
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