yeah as i recall magnetrons were initially for military use but they needed not to be anywhere near the same tolerances for microwave ovens
so they could be produced fairly easily. my microwave used to buzz and i done a search turns out it was likely the magnetron
( MiseryCunt you cannot be sirious, Tue 4 Jun 2024, 16:33, archived)

not even in my top ten

( Queef Smegwin U r a 🔔🔚, Tue 4 Jun 2024, 16:39, archived)

magnetron the merciless

( MiseryCunt you cannot be sirious, Tue 4 Jun 2024, 17:57, archived)

Leader of the Decepticons.
(Oooh_cuntroversial Where have I been?, Tue 4 Jun 2024, 22:23, archived)

twtj

(The Porcupine From Purgatory we of all lost both have them, Wed 5 Jun 2024, 6:41, archived)