What be a welding pirate's favorite noble gas?

Arrrrrrgon, says I. Ar.

I seem to be oxidizing my welds for some reason. Guess I'll try a shield gas.

Not a terrible fit. I went with steel screws instead of plastic pegs for strength.

Going to tackle the emitter again shortly. This time I designed a jig to help make the spot welding easier. Printing now!

Actually, that's not too bad. Now I just need it in porcelain with pins pressed in and I'm set.

Working on a new emitter base. Is this design alchemical? Mystical? Or just cursed?

After some questionable spot welding surgery, I was able to move the now annealed wire over a bit and get it centered in the aperture. It's back in the scope and baking again. See you tomorrow for the next exciting chapter!

...and after baking for a day, it didn't work. Turns out the loop shifted a bit when flashing as it annealed. Here's the trouble (the small dot on the wire to the upper left of the center hole is the point. It should be precisely in the center).

Welded! It's not perfect, but much straighter than last time.

If you're wondering about my janky rig, it's a repurposed carbon coater + variac. Vacuum at 8e-1 Pa, weight is a stainless hex nut. Cook at 10 VAC for roughly 90 minutes.

Last week's emitter didn't work out. Guess it's time to make more tungsten crystals!

Boom. All systems happy (if a little high pressure, due to the ongoing bake). Only 6.5 more hours to go!

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