A Milestone: first neon glow!

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Finally! I saw a neon glowing today, first time in my system! I filled the tube first on 1 torr with argon, then to 32 torr with neon, so the ratio is 1:31 = 97% neon and 3% argon. The glow doesn’t cover whole digit, the shape of electrodes is not perfectly parallel and there is just a back plate as the anode, so the electric field is not homogenous. So I have now reliable gas filling manifold. From now on, I am going to play with glass and make some “lab samples” 😉

I unfortunately drop my glow tube on the ground and the valve broke out.. So I just weld a tube onto it and use it without it, what a pitty 🙁