From: Lord Valve - 17 May 2008, 21:33
Here's how it was done, back in the day - an informational
film from Philips-Mullard on the manufacture of "radio
valves," starting with raw materials and progressing through
drawing wire, glass tube making, pins, grids, anodes, cathodes,
getters, assembly, evacuation, testing, etc. In three parts, just
shy of a half hour total. If you ever wanted to see...
4 Posts. Last post send by: Lord Valve - Saturday 17 May