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Old 25th August 2005, 12:49 PM   #1
tade is offline tade  United States
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Default flame for plasma transducer

any chance of using a burning flame to produce plasma for a plasma tweeter? or, if a flame is conductive, could you run an audio signal through it, while it is inside a magnetic gap like a ribbon driver?
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Old 26th August 2005, 02:42 PM   #2
orjan is offline orjan  Sweden
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ionized air has been used a few times. Google on jonophane.
There is also a homebuilt tweeter at http://www.plasmatweeter.de/
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Old 26th August 2005, 06:10 PM   #3
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Sure, not a problem. You can run a flame (MAPP, Propane..etc) seed it with a salt, something like KCl (aq). Put a couple of electrodes in the reducing part of the flame (proximal and distal)... add 400 - 600 VDC polarizing voltage and modulate with your favorite tunes. Low frequency will be determined by the length of the seeded flame. Another one of those instances where bigger is better!

Heat and HV, beware

Cyclotronguy
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Old 27th August 2005, 04:00 AM   #4
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Check this:
http://www.4x4pride.org/Flame/Docs/F.../FlameAmp.html

I_F
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Old 27th August 2005, 04:13 AM   #5
tade is offline tade  United States
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just amazing. i am gonna do it!
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Old 27th August 2005, 02:56 PM   #6
Paul W is offline Paul W  United States
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It has been a long time since chemestry...any toxic gases produced by seeding?
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Old 27th August 2005, 02:58 PM   #7
tade is offline tade  United States
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i chouldnt think so with something like salt. both chlorine and sodium are quite reactive. i think the biggest danger is that associated with an open flame. I wonder if i just use a sooty flame, the carbon atoms might work. are they ionized or just glowing?
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Old 28th August 2005, 02:13 PM   #8
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Have fun with your friends - do it with a campfire!
Use some stainless steel electrodes... pipe in some Jimi Hendrix and go for it!



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Old 29th August 2005, 04:26 PM   #9
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Soot laden flame will not be hot enough!!!! Soot will not give you ions... ya needs ions.

Stainless steel electrodes won't last through a single Jimmy Hendrix, cut. Best get yourself some tungsten (tig welding electrodes), they're cheap enough. Alternately you could use carbon arc gouging electrodes.

I've a very old text book (pre- 1900) on electrical machines; which credits Ben Franklin with a talking flame. Only reference I've seen to such a thing associated with ol Ben. I thought he had used all his "luck" up on the kite fiasco.

Cyclotronguy
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Old 4th September 2005, 09:21 PM   #10
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Hoot Mon!

Ya das gudden Tongueston!



When that nice oak or maple camfire is all red hot embers with blue flame, betcha it will work ok!

And, iirc ya can do it with a bunsen burner flame, i think with the seeding...

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