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Magnetron frequency
chris_leyson:
It's also urban legend that BeO is pink, as far as I know manganese makes the ceramic pink. Eimac also made a few special conduction cooled tubes. For example, 4CS250R BeO conduction cooled, 8873 was designed to be conduction cooled and used a separate BeO block. Then there are huge numbers of RF power transistors and mosfets that use BeO and they have to be treated as chemical or special waste. So it's a case of read the data sheet rather than repeat urban legend.
https://www.cpii.com/docs/library/9/Operating%20Hazards%20Sheet.pdf
http://www.tubecollectors.org/eimac/archives/8873(73).pdf
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