This is the second sputtering chamber that I built. The first was a 1pt. mason jar just to check the feasibility. I'll post and update with chamber number 3 when it's complete. The cap on this chamber includes a water cooled gun that holds 2 inch targets.
The lower power supply was the first one that I used for sputtering. It's a 25W vacuum tube test bench bench power supply that I built from the book "Beginner's Guide to Tube Audio Design". It worked fine with silver, but didn't have enough power to do aluminum. The second power supply that I tried was a 500V 1.25A electrophoresis supply that I picked up cheap, unfortunately it only lasted about 30 seconds while sputttering. Apparently the the solid state components didn't like the voltage spike from the huge inductor when the plasma went into oscillation. That's probably a lesson for for "It almost worked!". On to power supply #3. Having success with PS#1 & the tubes, I decided to cannibalize #2 for the transformer, choke and other goodies to build #3, which is the supply on top. It's somewhat power limited by the scavenged transformer, but has been working well so far. It's also makes a nice heater for the shop in the winter!