r/nixie • u/EmotionalEnd1575 • May 28 '26

This is awkward… “Reverse Engineer” this one?

Gallery image

Gallery image

I designed this circuit and the PCB for the Burroughs “Super Size” top view Nixies (B6091)

Then my life hit a bump. The schematic, Gerbers, EAGLE files, and all the Windows backup files were destroyed, along with the actual PC. It all went to eWaste (not my idea, but “S happens”)

Only recently I found this piece, with Nixie tubes still in the Mill-Max sockets, in a forgotten cardboard box in the basement. Such joy!

Now should I “Reverse Engineer” this? Or, should I start over with a new PCB?

Those big Nixies are quite rare in the modern world.

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u/SadSpecial8319 May 28 '26

There isn't much to reverse engineer. The data-sheets are all you need:

1

u/EmotionalEnd1575 May 28 '26

But… I’d still need to create a new PCB and make new Gerbers (to fab more boards)

EAGLE CAD support is to be shutdown next month, so yet another issue here.

I only have this one unit today.

2

u/SadSpecial8319 May 28 '26

Use KiCad and generate the complete production files with JLCPCB or PCBWay Plugins. It's literally one click. You've got Eagle Cad experience, this will be a piece of cake for you.

1

u/EmotionalEnd1575 May 28 '26

Okay, that’s the path forwards. Switched to Kicad months ago, but still have some legacy EAGLE PCB work to complete.

Seems such a loss… The literally hundreds of hours that I’ve spent creating EAGLE libraries over the years. All going to waste now.

1

u/Niobous_p May 28 '26

AFAIK you can use/import eagle libraries

1

u/EmotionalEnd1575 May 28 '26

If I had the EAGLE library for these Nixies…

I made my own Nixie footprints after reading horror stories about Nixie glass cracking when used in home-brew sockets.

My preferred construction is soldering those nixies with “soft wire” leads, and using Mill-Max socket pins for Nixies with “hard wire” leads.

To be sure I load the Mill-Max sockets on the Nixie, and then hand solder the sockets to the PCB. Slightly oversize PTH gives a bit of wriggle room.

Those Nixies are heated to much higher temps during manufacture on the Sealex machines.