I just looked at your images, the 8 is shaped like the one in your B4021 
photos, rather than the B8502, so I assume it is the long-lead variant of 
that.

Re. template. Yes, I made a bunch in photoshop(!). I wanted to be able to 
quickly see which tubes were physical drop-in replacements for which other 
tubes, so I made templates that had 12, 13, 14 and 15 equally spaced 
'holes'. A lot of tubes don't use all of those positions, for example a 
ZM1080 has twelve leads, but it has two gaps, so I drew it on the 14-hole 
sheet.

If I had more time, I would write some software to generate images of them, 
including radius, angles, front indicator and pin/lead diameter - I would 
like to include them on my web site (http://nixies.us/). Actually, this 
might be quite easy with HTML canvas/css3. Perhaps an HTML form that took 
the parameters and generated the image.

On Monday, April 23, 2018 at 4:05:41 PM UTC-4, SWISSNIXIE - Jonathan F. 
wrote:
>
> yes could be B4021 or B-8502
>
>
> OT: Did u made a template with bases to note down positions of numbers on 
> pins? if yes, great idea!
>
>
>

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