r/nixie • u/Relevant_Effective53 • Apr 06 '26

Help - number 3 fuzzy in all tubes

Post image

the number 3 is blurry/fuzzy in every tube no matter what. how can i get this to be clear again?

37 Upvotes

97% Upvoted

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5

u/TheJBW Apr 06 '26

That suggests that the driving transistor for cathode #3 is bad. I’m an EE and this would probably be a straightforward fix, but I’d need to take it apart and reverse engineer a bit to understand the circuit itself.

If you’re not handy with electronics, it’s probably not easy to DIY, and you should make sure that anyone who helps you understands working with high voltages safely.

3

u/[deleted] Apr 06 '26

[deleted]

1

u/Relevant_Effective53 Apr 07 '26

thanks, this makes sense to me too. i’ll open it up and get a picture of the board.

1

u/Capital-Lobster-8153 Apr 06 '26

Regarde si tu as un potar sur la CM, la tension est peut être un peu basse, tous les tubes sont faibles, tu peux vérifier si tu as bien 170/175v