The H tube is end-view...

On Sunday, December 1, 2024 at 11:07:48 AM UTC-5 J Forbes wrote:

> I'll answer the easy question first. The reason they don't make end view 
> tubes is that it costs a lot of money and take  an incredible amount of 
> work to make tubes. So, they need to make the most of the tubes they make, 
> and this means being able to get the most money for them. So they have to 
> be beautiful, large, expensive tubes. The character size in an end view 
> tube is limited, vs that in a side view tube, so they only make side view 
> tubes. It's what people will pay lots of money for.
>
>
> On Sunday, December 1, 2024 at 8:58:16 AM UTC-7 HikariFaith 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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