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Re:2450MHz radiation induces stress and anxiety like behavio... by anotherhue on Wednesday October 06, 2021 @05:52AM (#28771080)
2.6 was chosen based on empirical heat penetration testing for typical target food sizes, e.g. Potatoes.

GE lobbied for 2.4 instead so they could emit a noisy harmonic from a crystal based 1.2 system so the FCC agreed.

Source: national archives documents I researched

Re:2450MHz radiation induces stress and anxiety like behavio... by jazzyjackson on Wednesday October 06, 2021 @10:43AM (#28773750)
Cool! I came across some quoras that suggested the electronics were easy for 2.4, but didn't give further detail. Noisy harmonics does sound useful for cooking!