Hello all. I found this site and thought I could post what I have been up to and ask for advice from those who may have worked on a similar project. I have been building a homemade LN2 generator. It is not a cryocooler. I don't use premade cooling devices. Mine is built from the bottom up like Linde's original device.

I plan on making a better video, but I finally collected my first batch of liquid air. Using pure N2 will be soon.
http://www.youtube.com/watch?v=4Go9b2eMiHQ

I am just wondering if anyone has done this before at home? I am still trying to improve my regenerative cooling coils. Also, does anyone have experience with the joule thomson throttle? Specifically, is there an optimum design for expanding the compressed gas?

Thanks.