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4hv.org :: Forums :: High Voltage
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electrical arc colors, what causes different colors?

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PresentTeck
Wed Oct 05 2011, 09:45PM
PresentTeck Registered Member #3922 Joined: Thu Jun 02 2011, 06:24AM
Location:
Posts: 23
i think we're gonna experiment with a flyback transformer and a zvs driver, hooked up to a variable amp power source, and see what happens
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Ocean Waves
Fri Nov 04 2011, 10:58PM
Ocean Waves Registered Member #4181 Joined: Thu Nov 03 2011, 02:39PM
Location:
Posts: 42
it had to do with a complex relationship between arc energy, gasus equilibrium, tempature, and the various chemical reactions that take place over a wide range, where ozone is prefered at low energy, but at higher energies it is decomposed in the favor of nitrogen oxides, which emit on differnt lines, the folks that worked on atmospheric niotrogen fixation using arcs, as i reacall while chaising the same processes, reported a lot evidance for what all the plasma states where, i would look there first................
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Electrikid221MnM
Sat Nov 05 2011, 01:11PM
Electrikid221MnM Registered Member #4172 Joined: Sat Oct 29 2011, 05:57PM
Location: Narnia
Posts: 27
i think it might have to do with the current because i have an nst at 30 mA which makes purple arcs and an mot at 1 amp which makes the orange arcs .
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Tetris
Sat Nov 05 2011, 02:20PM
Tetris Registered Member #4016 Joined: Thu Jul 21 2011, 01:52AM
Location: Gainesville, FL
Posts: 660
Electrikid221MnM wrote ...

i think it might have to do with the current because i have an nst at 30 mA which makes purple arcs and an mot at 1 amp which makes the orange arcs .
Your NST makes purple arcs? Mine makes orange arcs and at the same current level. Weird.
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Electrikid221MnM
Sat Nov 05 2011, 03:18PM
Electrikid221MnM Registered Member #4172 Joined: Sat Oct 29 2011, 05:57PM
Location: Narnia
Posts: 27
it might have to do with the fact that my NST is solid state
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Electrikid221MnM
Sat Nov 05 2011, 03:34PM
Electrikid221MnM Registered Member #4172 Joined: Sat Oct 29 2011, 05:57PM
Location: Narnia
Posts: 27
thats definitely because of the current
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Ocean Waves
Sun Nov 06 2011, 06:33PM
Ocean Waves Registered Member #4181 Joined: Thu Nov 03 2011, 02:39PM
Location:
Posts: 42
Ive had a few SSNST's and i don't recalling one making purple arcs, they still have flaming type arcs very similar to that of a fly-back being feed an equal level of power, purple only accrues below a predictable current threshold, perhaps you SSNST has partially kicked the bucket? short your SSNST through a analog 50 ma meter and see how many ma its producing.
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Platinum
Sat Nov 19 2011, 03:35PM
Platinum Registered Member #3926 Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525
Link2
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Patrick
Sat Nov 19 2011, 05:25PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Platinum wrote ...

Link2

Yes, platninum. we all consided this before. but the color of the flame and a chemical weak in spectra (like barium chorlide) can have its natural spectra washed out. (i had this problem in chem1A)

Or, in our case you can have strong arcs overpowering the chemical spectra by incandescence. and or adding metallo-organic chemistry from the electrodes, which could cause spectra change too.
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Platinum
Sat Nov 19 2011, 10:48PM
Platinum Registered Member #3926 Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525
Sorry I was just suggesting that.
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