Interesting article shows how to use opposite phase heat for cooling

Any one remember the contra-polar electricity article from Popular Electronics? That one was also dated April 1.

Ed

As I remember that article, they used the properties of the square root of a number can be either positive or negative, and using the negative root to pipe electricity backwards through a heater, chilling the surroundings.

Jim

-- "If you th>> This is in German, but may be worth translating,

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Here's one:

"Cooling of Atmosphere Due to CO2 Emission"

Except I don't think they're April Fooling. Not deliberately, anyway.

or this?

martin

1954? At least that's what I'm remembering, though it's been years since I saw it. Cover picture of an ice cube tray on a "hot plate", with heavy frost on the tray. But I also have this vague recollection that the artist had drawn the hot plate with---a glowing-red element! Maybe that was on purpose to clue the clueless that it was an April issue.

Other magazines have done similar. The ARRL ham radio magazine, "QST," used to run an April article. In the old days, I believe that Larson E. Rapp was commonly the author.

Cheers, Tom

Yup! See "Audio Frequency Enhancement" for this April.

Ed

I almost got bit by one of them once. I had just gotten my novice license, and an article appeared: "Power a-plenty, for Pennies!", which showed a transmission line with thick wire, which necked down to thin wire, and the premise was that when the electrons build up at the shoulder, the voltage would increase, increasing your ERP without running illegal power in your final.

They made up some acronym, and called it the LIRPA 1. ;-)

Cheers! Rich