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[Phys-l] No load OK after all?

No, not mutual funds, but microwave ovens.

In the 1960s, Litton <> bought Studebaker's <> Franklin Manufacturing assets, which had been manufacturing magnetrons and building and selling microwave ovens similar to the Radarange. Litton then developed a new configuration of the microwave, the short, wide shape that is now common. The magnetron feed was also unique. This resulted in an oven that could survive a no-load condition indefinitely. The new oven was shown at a trade show <> in Chicago <>, and helped begin a rapid growth of the market for home microwave ovens. Sales figures of 40,000 units for the US industry in 1970 grew to one million by 1975. Market penetration in Japan <>, which had learned to build less expensive units by re-engineering a cheaper magnetron, was more rapid.

bc, not going to test this tho.