DIY Cryocooler based Liquid Nitrogen Generator (liquid air) - YouTube
A DIY Pulse Tube Cryocooler In The Quest For Home-Made Liquid Nitrogen | Hackaday
Beta Type Stirling Engines - updated 12/30/2011
Cryocooler Stirling 1-stage build, some questions | Physics Forums
DIY liquid nitrogen generator - Make:
Catherine on Twitter: "this DIY cryocooler seems to use a membrane pump which is way more compact, no details though... https://t.co/4KbmKy3FMn" / Twitter
xDevs.com | STI SuperLink RX cryocooled RF filter review