![]() Here’s how the magnetron went to war.įor most of the early days of radio, most of the innovation was geared toward providing communication at a distance. And the risks taken to develop this idea, the cavity magnetron, and field usable systems based on it are breathtaking in their scope and audacity. But there was one invention that not only influenced the war but has a solid claim on being its key invention, one without which the outcome of the war almost certainly would have been far worse, and one that would become a critical technology of the post-war era that would lead directly to innovations in communications, material science, and beyond. Indeed, many of the ideas that sprang from the fertile and desperate minds of British inventors went on to influence the course of the war in ways they could never have been predicted. We’ve seen before that no idea that could possibly help turn the tide was considered too risky or too wild to take a chance on. The entire country was mobilized, prepared for Hitler’s inevitable invasion force to sweep across the Channel and claim another victim. The Battle of Britain was raging in the skies above the English Channel and southern coast of the country, while the Blitz ravaged London with a nightly rain of bombs and terror. The Nazi war machine had been sweeping across Europe for almost two years, claiming countries in a crescent from Norway to France and cutting off the island from the Continent. ![]() ![]() In 1940, England was in a dangerous predicament. ![]()
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