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Forums
4hv.org :: Forums :: Tesla Coils
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Frequency vs Heat

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Ryan
Sat Feb 28 2009, 05:52AM Print
Ryan Registered Member #1606 Joined: Fri Jul 25 2008, 02:40PM
Location:
Posts: 71
Does the frequency of a tesla coil affect the temperature of the plasma it produces?

How would someone produce a "hotter" plasma?

-Ryan
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Mads Barnkob
Sat Feb 28 2009, 08:00AM
Mads Barnkob Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
High frequency and CW mode will give you short and very hot flame like discharges

Look up some of the MHz coils that have been built, class E sstc or vttcs.
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Ryan
Sun Mar 01 2009, 07:02PM
Ryan Registered Member #1606 Joined: Fri Jul 25 2008, 02:40PM
Location:
Posts: 71
This may sound like a very amateur question.. but if you were to touch a flame such as that coming from a coil, wouldn't it burn you from the heat? Or does the skin effect from the high frequency play a factor.

-Ryan
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Arcstarter
Sun Mar 01 2009, 07:22PM
Arcstarter Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Yes, it will definitely burn. A 300khz vttc does not have too thick flames, but my 8.2mhz vttc would burn anything. 300khz vttc had about 7 inch sparks, unrectified (tube conducts one way) with 2kv in and 811A, and the 8.2mhz vttc with 2kv in, fullwave rectified, and 833C had about 1 inch streamers. The arcs from the hf vttc would burn 12 gauge in a matter of seconds though.
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Ryan
Sun Mar 01 2009, 11:35PM
Ryan Registered Member #1606 Joined: Fri Jul 25 2008, 02:40PM
Location:
Posts: 71
Are frequency values of 8.2mhz (or comparable) possible with a SSTC style board?

-Ryan
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MRacerxdl
Mon Mar 02 2009, 12:47AM
MRacerxdl Registered Member #989 Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
I think maybe, if you use a high speed fet it may work at 8.2Mhz. But that is a complicate driver to do, 8.2Mhz with a few pF of gate...
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guich
Wed Mar 04 2009, 03:23PM
guich Registered Member #1269 Joined: Sat Jan 26 2008, 06:22PM
Location:
Posts: 9
I think a small SSTC could be realized with a bipolar transistor, they can switch really fast (but then there´s the problem where you get the current for the base)
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Steve Conner
Wed Mar 04 2009, 04:04PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Link2 <- richie burnett's 4MHz Class-E SSTC
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Dr. Drone
Wed Mar 04 2009, 05:38PM
Dr. Drone Registered Member #290 Joined: Mon Mar 06 2006, 08:24PM
Location:
Posts: 1673
shades
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GeordieBoy
Wed Mar 04 2009, 05:41PM
GeordieBoy Registered Member #1232 Joined: Wed Jan 16 2008, 10:53PM
Location: Doon tha Toon!
Posts: 881
...and again at 8MHz...

Link2
Link2
Link2
Link2
Link2
Link2
Link2
Link2



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