The 1947 Radarange was a whopping six feet tall, weighed nearly 750 pounds, and required its own 220 volt electrical line and a dedicated water line for the cooling tube. It sold for $2000, or nearly $22,000 today. Not yet an appliance for the home cook, Raytheon marketed the behemoth appliance to high-volume, quick service restaurants. Busy diners, ocean liners and hospitals all purchased their own Radaranges, cooking hamburgers and sheet cakes in less than 30 seconds.
Link -via Boing Boing
in 50 short years.