A-201 board ( partial)

[bogdan paduraru]

Hello all,

I ve managed to get a board that uses 3 pieces of A 201 polyatrons ; unfortunately the owner cut the part that had some nixies . He doesn't have any photos and he doesn't knew the model of the device that used the board.
Maybe somebody recognizes this board and provides some information? I see that even Martin was looking to get some photos of any device that used these kind of tubes .
Thanks

[Dekatron42]

I do have the complete board and even a part with just the Nixies which I bought since the Nixies were crushed on the complete board.

It turns out to be a Thickness meter according to a friend and the circuit diagram can be found here: https://dekatronpc.com/index.php?title=%D0%A4%D0%B0%D0%B9%D0%BB:A201_connection_example.png . I tried to contact the owner of the circuit diagram but never got an answer back.

I thought I already had posted this information here on the forum, but I seem to be mistaken.

/Martin

[bogdan paduraru]

Please show a photo of the complete board if possible.

Will be hilarious if you have the exact missing part from mine 😀

On 13 Jun 2026, at 17:02, Dekatron42 <martin....@gmail.com> wrote:



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[Dekatron42]

I think your board is a lot older than mine as I have the more modern see-through circuit board where you can easily see the traces through the board, likewise was the cut-off piece similar. Yours has a lot rougher circuit board type.

This thread https://groups.google.com/g/neonixie-l/c/wFDDHJ5f1b0/m/orQOZos6BwAJ contains photos of a complete board.

/Martin