Vacuum tube manufacture

This video comes from Tesla company archives and was presented on exhibition called “(Un)forgotten Tesla“ in Valasske Muzeum v Prirode in town Roznov pod Radhostem - town where Tesla originated from. I would like to thank to Valasske Muzeum v Prirode for making the video and for keeping it for future generations. Site of the museum (google translator will help): My site: https://www