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Hello I am a High School senior and I am planning on building a solid state audio modulated tesla coil. What I am looking for is to build a coil with arcs of about 2 feet or more. I have a budget of $400 and I would like to know if anyone has suggestions. Does anyone have schematics for a coil that is known to work very well? Of course, I will not use the schematics for my project strictly, as I would like to customize it, however, I am having a little bit of trouble with the tesla coil driver circuitry... I was thinking about staying within analog and not using MIDI, but is it possible to do this and still have large sparks? Ive seen vids of it done but all the sparks are small and dissipate (the output sparks are not concentrated into "bolts").
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Hello Trevor, Welcome to our Virtual Community!
I hope you won't take it amiss if I suggest that unless you are a fairly experienced constructor, that a project such as yours might well result in disappointment.
If not, there are plenty of suitable circuits both in 4HV.org (search!) and online in general,
Registered Member #1025
Joined: Sun Sept 23 2007, 07:53PM
Location: Czech Rep.
Posts: 566
Hi Trevor, With audiomodulation you have to decide first what is your aim. You have basically three options. Either you go for a "hi-fi“ sound and than you can look at the well discussed Plasmasonic project. However, this way of audio modulation is energetically very inefficient (coil works in CW) and you will never get the big sparks, more likely corona-like streamers…
Second way is not a real audiomodulation, it is just a change in the frequency of an interrupter. The coil works as a simple oscillator and by changing the freq. you get different tones. You can hook such coil to midi device and produce very nasty sounds, but very big and loud sparks…That’s the way how all the big DRSSTC you can see on the YouTube are audiomodulated.
The third way is a combination of the two principles. You set the interrupter to the freq which is above the range of human ears (above 20Khz) and than you audio-modulate the PW of the pulses from the interrupter. I have never seen such audio modulation except one example – my own coil introduced just recently in this thread I thing that for a large DRRSTC is freq of an interrupter over 20Khz deadly so you cannot avoid using the half rectified unsmoothed AC which will always introduce serious distortion, but it sounds quite cool But maybe I’m wrong and somebody have used this approach for CW powered DRSSTC too.
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
For your application, I would recommend a simple low power audio modulation project using a CW solid state coil. Sure, a disruptive coil (DRSSTC) has the larger arcs, but only reproduces buzzing noise tones. The CW coil on the otherhand produces near perfect audio modulation.
Case and point, a Class-E type of this coil can produce nearly a silent arc and create pristine audio output.
Here is a video of one such coil:
I sell kits for these for well less than your $400.00 budget.
Or you can use plans devised already by other enthusiasts and build your own. Richie Burnett has some Class-E designs on his website, and there are few others as well.
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Senior Project - NEED help!!
