Any hope for tubes with a silver coating?

[alex nolan]

I just received some high-value (at least to me) nixie tubes that have mild silver patches on the glass. It's not really obscuring the numerals, but there is a bit of partial blocking.

Is there any way to mitigate or remove the silver patches? If not, are there any best practices I can follow to prevent them from growing as I use these tubes (or even while they are being stored)?

Thanks!

[Adam Munich]

I've thought about this too. I suspect a q-switched laser might be able to blow off the coating without damaging glass, but I have not tested this theory. 

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Weblog: http://adammunich.com

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[Nicholas Stock]

NL934’s?

Sent from my iPhone

On Apr 28, 2020, at 12:22, Adam Munich <m...@adammunich.com> wrote:



To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAF2ed1McY0_jsdJB9FYRrGHZQfsZeHaYB%3DPmgVS8Qd%3Dq0Tm5DQ%40mail.gmail.com.

[Nicholas Stock]

NL934’s?

Sent from my iPhone

On Apr 28, 2020, at 12:22, Adam Munich <m...@adammunich.com> wrote:



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[Bill Notfaded]

Some tubes just really did this badly. I'm not sure once the metal is embedded into the glass it can easily be removed. I didn't know rubidium bulbs could have the Rb migrated back to the other side... but alas it can be done and restore a Rubidium frequency reference to working with a heat blower so who knows maybe it's possible. There's one way to find out right?

Bill