• Magnetic lens

    Quasi Scientist • an hour ago • 0 comments

    Magnetic lens is really cool concept! Here is Crook's tube I've bought (was not able to make by myself yet) and magnetic lens was added. Actually it is a simple coil. By varying voltage, hence current in the coil. The spot can be concentrated to about 2mm 

  • Florescent tube

    Quasi Scientist • 04/01/2026 at 15:53 • 0 comments

  • Simple nixie tube

    Quasi Scientist • 03/02/2026 at 15:43 • 0 comments

    I've bought simple 0.3Pa vacuum pump which seemed to be reliable. I've pumped the air out until the glow turned to dim blue. Then I've cut close using standard torch. It's amazing! I feel the video doesn't show how really beautiful it is. 

    Another interesting thing is how glow change when tube depressurized. The color change from dim blue to red through white bright 

    Note: Most of sites/video like jdflyback and simplifier use metal to glass connection. I was not able to make one which not leaked. Instead I've used different heat resisstent glue. It is success and was not leaked yet.