Comment on [Technology Connections] Video projectors used to be ridiculously cool [34:39]
unphazed@lemmy.world 8 hours agoI was a kid, so don’t remember everything as my Dad explained it, but it used a more powerful magnetron with a pulse system and used a fan to blow the heat. It also cooked hot pockets without leaving the outside cold and lava inside. Moreso than that, I don’t remember as it was a tech geek dad talking to a 12yr old teenager that only cared to listen to the first half. I was a shit, and I regret ignoring the trove of knowledge that man had.
frezik@lemmy.blahaj.zone 1 hour ago
It might have had something that can shift its frequency.
What happens in most microwaves is you get a standing wave. The high and low parts of the wave are always at the same spot. You then get a hot spot at the peek (and trough) of the wave, and a cold spot when the wave is near the zero node.
By shifting the frequency, even just a little, you can shift the hot spots around and more evenly cook the food.
This is obviously more expensive, and these days you can get it in higher end residential microwaves. Way back when, though, it was only something you’d see in industrial models.