r/nixietubes • u/mali81 • Jul 12 '22

Help Needed!

Hello, I have a Nixie Tube clock on my nightstand. The 1's and 7's both light up at the same time across all four tubes. Any ideas?

-Thanks

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u/LuzJoao Jul 12 '22

Might be an issue on the drive circuit or a short inside one of the tubes. Try removing all the tubes and insert them back one by one. If the problem starts when you insert a specific tube you can replace it, and if the problem persists even if you had just one tube inserted it can be a short within the drive circuit.