THE GREAT MULLARD MAGIC BLOG — grid wire

VALVE TYPES & MANUFACTURING TECHNIQUES (iv) - TUNGSTEN WIRE

Posted by STEVE M on

VALVE TYPES & MANUFACTURING TECHNIQUES (iv) - TUNGSTEN WIRE

OK,  for today's blog entry I promise that I am not going to act like a  Chemist wonk (even though I am one!)  but rather instead, a thermionic wonk ( because I am one as well)!!!!!.     Last time, we took a look at Tungsten, an essential commodity used in wire for just about every valve ever made.  We left the story at the metallic powdered tungsten stage and picking up the tale again, here we have a nice ex-Mullard photo of a batch of the fine dark grey powdered tungsten leaving one of Mullard Blackburn's reduction furnaces: -...

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