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Bouncing off the walls

This comes from a footnote in the April issue of QST (Page 32):

A technical journal named The WCF Experimenter.

Its Spring, 2016, issue has some interesting projects for both the advanced builder and those with more moderate skills.

One of the latter articles describes an Arduino-based device for measuring the speed of sound at your location, by bouncing sound off a wall and measuring it's return time.

It might be a good anesthetic for cabin fever.

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About AC9KJ

I earned my licenses because I'm not into Bingo or trips to casinos, and because it was on my bucket list. It also keeps me busy in the absence of my wife, who passed on, three years ago. I'm 78 years old and briefly held a Novice license (WN9MIU) in about 1970. I'm a former commercial radio Program Director and Music Teacher. Right now I'm operating HF on a a Kenwood TS-590SG, with an indoor loop antenna. The car radios are a Yaesu 8900R and/or a Yaesu FT-857D, supplemented by a Yaesu FT-60 HT. I'm slowly learning Morse code (my apartment is an SSB black hole), and will eventually get into PSK31 and modes of that ilk.