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Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Everyone knows Benjamin Franklin's famous experiment in 1752 where he flew a kite into a thunderstorm, and drew sparks from a key hooked up to a Leyden Jar (a capacitor) tied at his end of a silk kite line.
Several people who have tried to copy the great man's experiment have been electrocuted.
Registered Member #61373
Joined: Sat Dec 17 2016, 01:45PM
Location: San Antonio, TX
Posts: 87
The bottle was not a Leyden jar, but a makeshift spool for the wire. How does the relatively small voltage (10s kv+ and milliamps) of a flyback trigger a 100mv lightning bolt from the storm?
Do you think the flyback hooked up to the wire had any effect on attracting the bolt?
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
ScottH wrote ...
The bottle was not a Leyden jar, but a makeshift spool for the wire. How does the relatively small voltage (10s kv+ and milliamps) of a flyback trigger a 100mv lightning bolt from the storm?
Do you think the flyback hooked up to the wire had any effect on attracting the bolt?
I don't know, Scott - if the video is genuine, perhaps the flyback voltage had the effect of pre-ionisation around the wire, as used in some triggered spark gaps.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
The television does in fact contain a high voltage capacitor very similar indeed to a Leyden Jar. The mu-metal shielding plated onto the glass is designed to function as a capacitor, and is used as such in the HV voltage multipliers in many television designs of that vintage.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
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I did wonder if a TV tube could be repurposed as HV storage. Turns out that it can, but the ESR makes it almost useless. A typical CRT can take around 3* its normal EHT voltage but this risks it imploding.
Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
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I would suggest that if you hooked up a kite tethered by a wire strong enough not to break the coronal loading up the wire would not be supported by the small flyback which also sweeps the beam and lights up the tube face. Yet the TV on the you tube was working.
Having said that, I have flown the hydrogen balloons on the end of the aerial lead on a Gibson Girl transmitter, It works just dandy.
I also have written up insurance report for a big TV destroyed by a lightning hit on the aerial.
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What do you guys think of this video? Some guys attract lightning to a wire.
