Tibi.fusion Verified User
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Tibi.fusion replied to the thread George Egely's Magic Wand.
Interpretation of previous zip file contents:
Oscilloscope print1-2 shows passive probe calibrations.
Ch1: 10:1 Rigol PVP2150 150MHz probe used with short ground wire for current measurement through non inductive shunt resistor
Ch3: 100:1 Hantek T3100… -
Tibi.fusion reacted with
to Stevenson’s post in the thread George Egely's Magic Wand.
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It is an interesting phenomenon: the teeth are part of the same curve, with a single time constant (it is a DC voltage) that is repeatedly "broken" by secondary disharges (that can occur at lower voltage since the gas has been pre-ionized by the… -
Tibi.fusion reacted with
to LDM’s post in the thread George Egely's Magic Wand.
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If I interpret your scope pictures correctly, then the first high to low transient is about 50 nS and the Voltage step 1750 Volt.
So your change is 1750/.05 = 35000 V/usec
Assuming they have exactly the same value, this is 17500 V/usec per capacitor
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Tibi.fusion replied to the thread George Egely's Magic Wand.
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Bingo! A progressive failure by eating/melting away sections of the metalized foil electrode could also explain the second/third charging pulse? I'm thinking about the mechanisms of it, considering the parasitic inductance of load resistor (I did… -
Tibi.fusion replied to the thread George Egely's Magic Wand.
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Tibi.fusion reacted with
to Frogfall’s post in the thread George Egely's Magic Wand.
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Thankfully you have survived with only a scratch. Those of us who have been "liking" your progress, on here, probably bear some responsibility for not regularly repeating warnings. I know Alan has repeated them quite a lot, but it is easy to ignore… -
Tibi.fusion replied to the thread George Egely's Magic Wand.
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No worries, it's just food grade plastic!
Sorry could not resist the joke. But seriously, I could not detect any fragments. And being non toxic is good. The fragments were not as small and sharp as glass would be i.e. Maybe I got hit by a bigger chunk.… -
Tibi.fusion replied to the thread George Egely's Magic Wand.
Pro tip: if you plan after a quick shower to clean your room overnight with powerful alkaline solution, then with vinegar water, try releasing a small amount of hydrogen gas on your live spark experiment in air, like I did! ('Coz methane from a lighter… -
Tibi.fusion replied to the thread George Egely's Magic Wand.
Now for the interesting bit: first sparks.
The idea was to play around with an old broken plasma globe's flyback converter, solder quickly together George's relaxation oscillator just on the test bench using random components from the drawer, have a few… -
Tibi.fusion replied to the thread George Egely's Magic Wand.
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Tibi.fusion replied to the thread George Egely's Magic Wand.
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Tibi.fusion reacted with
to Alan Smith’s post in the thread George Egely's Magic Wand.
Electrode erosion is the problem - no magic involved, the arc just vapourises the Aluminium. - bigger electrode tube means more real estate for the sparks to erode. -
Tibi.fusion reacted with
to Alan Smith’s post in the thread George Egely's Magic Wand.
I spent yesterday afternoon at Culham Labs (home of the now abandoned JET fusion project) where George Egely ran one of his rigs several times in the presence of somebody from UL (Milan) and some other interested observers, including a famous Chinese… -
Tibi.fusion replied to the thread George Egely's Magic Wand.
Status update: another noob mistake...
I've attempted to build a lazy variant the "energy efficient" idea, where the key change is to move the electrodes closer.
The mistake I made was in lack of better materials and difficulty to reach the bottom of the…