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Registered Member #4659
Joined: Sun Apr 29 2012, 06:14PM
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Posts: 158
I saw on HvWiki that it's possible to make a homemade capacitor. Tiny capacitance, like 3nF, but it could handle up to 60kV(!). As an interesting thought experiment, i pulled up Barry's RLC sim to see what would happen if I used this as a capacitor on my coilgun.
The sim says that, due to the "ringing" of the coil, there would be an (essentially) 14kHz AC current through the coil. 14kHz is radio frequency! I don't know much about radios and how they work, but would this generate radio waves / interference of any kind?
Registered Member #3637
Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
Definitely. You'd be making essentially a mini radio oscillator circuit. Of course the oscillations would die down really quick. You'd be making a little "ping" on radios, if you could get the frequency up higher.
Registered Member #4659
Joined: Sun Apr 29 2012, 06:14PM
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Posts: 158
Inducktion wrote ...
Definitely. You'd be making essentially a mini radio oscillator circuit. Of course the oscillations would die down really quick. You'd be making a little "ping" on radios, if you could get the frequency up higher.
interesting. So I don't need any sort of antenna. And.... how do antennas work anyway?
Registered Member #3215
Joined: Sun Sept 19 2010, 08:42PM
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Posts: 780
quite close to the "pouuiiiiiiiiii...." you can hear when a modified hartley oscillator based capacitor charger like a photoflash unit slowly changes frequency as the resonant frequency of the system is increasing with output impedance, but inverted as it discharges in place of charging
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discharging a 3nF HV capacitor through a coil
