Around the world, around the world
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FastRadioBurst 23 here letting you know of our shortwave outings this week.
On Sunday 18th May 2024 at 0900/1300 hrs UTC on 6160 kHz and then at 2000
UTC o...
2 hours ago
Dude, use a black pen next time.
ReplyDelete73.......Steve Smith WB6TNL
Neat ! I did that experiment with sound waves as a science project back in 1972. Used a mic pickup on the end of a yardstick which was mixed with a reference tone. Another amp from the mixer out drove a neon lamp next to the mic. I took "pictures" of sound waves using a long exposure on a Polaroid camera and sweeping the mic/lamp in front of a speaker driven by the reference tone. Won second prize in the science fair !
ReplyDeleteRich VE3MKC