Miniature vacuum tubes, radar-triggered detonation, devastating anti-aircraft shell performance, and the ultra-secret WWII technology that altered the course of history. Welcome to VT Proximity Fuze: The Tiny Radio That Changed WWII Artillery. In this fascinating military technology and history documentary, we explore the engineering marvel and battlefield impact of the Variable Time (VT) proximity fuze—one of the best-kept and most decisive secrets of World War II.
