That voltage from the crystal creates an electric field, which exerts a force on free charges in the air. (There's always some free charges floating around, like electrons and ions.) These charges accelerate and collide with air molecules, kicking loose more free electrons that also accelerate and collide, and so on, in an exponential chain reaction. We call this an electron avalanche. And guess what happens? Acceler…
Build a radio wave detector with balls of aluminum foil
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Re: Build a radio wave detector with balls of aluminum foil
#12That voltage from the crystal creates an electric field, which exerts a force on free charges in the air. (There's always some free charges floating around, like electrons and ions.) These charges accelerate and collide with air molecules, kicking loose more free electrons that also accelerate and collide, and so on, in an exponential chain reaction. We call this an electron avalanche. And guess what happens? Acceler…
That is how air becomes conductive.
Re: Build a radio wave detector with balls of aluminum foil
#13That voltage from the crystal creates an electric field, which exerts a force on free charges in the air. (There's always some free charges floating around, like electrons and ions.) These charges accelerate and collide with air molecules, kicking loose more free electrons that also accelerate and collide, and so on, in an exponential chain reaction. We call this an electron avalanche. And guess what happens? Acceler…
But this description sounds more like a particle accelerator and less like anything to do with radio waves. All of this stuff is irrelevant. As you've pointed out, you could just as easily put the crystal in a vacuum and get RF emissions from it.
Re: Build a radio wave detector with balls of aluminum foil
#14Re: Build a radio wave detector with balls of aluminum foil
#15"Sir J C Bose's Diode Detector Received Marconi's First Transatlantic Wireless Signal of December 1901 (The “Italian Navy Coherer” Scandal Revisited)" https://www.tandfonline.com/doi/abs/10.1080/02564602.1998.11...
Non paywalled link https://www.cse.iitm.ac.in/~murthy/sirjcbose.pdf
https://en.wikipedia.org/wiki/Jagadish_Chandra_Bose
Anyhow, rather than grains and gravels of metal that had to be physically separated by tapping, the oil-film-over-mercury would reset on its own due to surface tension when the EM stimulation ceased. This allowed for higher "Baud".
Re: Build a radio wave detector with balls of aluminum foil
#16Wait, so you're telling me that my hat instead of stopping mind control attempts is actually AN ANTENNA?
Re: Build a radio wave detector with balls of aluminum foil
#17Wait, so you're telling me that my hat instead of stopping mind control attempts is actually AN ANTENNA?
Re: Build a radio wave detector with balls of aluminum foil
#18Mehdi from electroboom did video on this, the range is few meters. If I remember correctly the spark breaks oxide layers and makes contact.
Re: Build a radio wave detector with balls of aluminum foil
#19That voltage from the crystal creates an electric field, which exerts a force on free charges in the air. (There's always some free charges floating around, like electrons and ions.) These charges accelerate and collide with air molecules, kicking loose more free electrons that also accelerate and collide, and so on, in an exponential chain reaction. We call this an electron avalanche. And guess what happens? Acceler…
Re: Build a radio wave detector with balls of aluminum foil
#20Wait, so you're telling me that my hat instead of stopping mind control attempts is actually AN ANTENNA?
Truth was bound to get leaked at some point. CIA had a good run.
https://web.archive.org/web/20100708230258/http://people.csa...