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The GE Spacemaker XL Over-the-Range Microwave Oven was discontinued by ... or screeching would likely be dealing with a worn-out magnetron, which produces electromagnetic waves that cook food.

Microwave ovens are everywhere, and at the heart of them is a magnetron — a device that creates microwaves. [DiodeGoneWild] tore one apart to show us what was inside and how it works.

The post-war period saw a proliferation in magnetron applications, beginning with the invention of the microwave oven in 1946 and continuing today with base stations for LTE and 5G networks.