THE GREAT MULLARD MAGIC BLOG
WHAT'S INSIDE A VALVE? (v)
Last time, we only covered half the story about the CATHODE and today we'll look at the indirectly heated type. These have a construction in which a pure metallic nickel...
WHAT'S INSIDE A VALVE? (v)
Last time, we only covered half the story about the CATHODE and today we'll look at the indirectly heated type. These have a construction in which a pure metallic nickel...