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Registered Member #105
Joined: Thu Feb 09 2006, 08:54PM
Location:
Posts: 408
That is a very nice project for such a new member! Keep it up! I recently finished my VTTC plasma tweeter, and the sound quality is great, however i used a digital camera video recorder, so the sound is awful in the recording! In real life, it really does sound quite fantastic Nice clean work, too
Registered Member #1211
Joined: Fri Jan 04 2008, 11:20AM
Location: England - UK
Posts: 19
Thanks for the positive comments, it's good to know I'm going in the right direction ! The next logical next step has to be a stereo version. Should be a fun challenge :)
Decided to keep away from using dance/electronic/synth music to demo it, as this can hide a multitude of failings in the sound reproduction (distortion & poor frequency response etc). Perhaps some strong female vocals or classical piece ? - might make for some interesting listening.
@ Mates - There's nothing special about the design, but I did pay special attention to the decoupling of each stage, to prevent unwanted oscillations & noise. The PCB design took the longest - the reflector was made of scrap.
You don't want a thick, long, white-hot arc. This will look impresive, but brings lots of problems. Excessive power consumption, overheating windings, electrode damage, instabillity and RF noise.
The small DC flyback, is from a colour portable TV - the operating frequency is 110Khz
Registered Member #1232
Joined: Wed Jan 16 2008, 10:53PM
Location: Doon tha Toon!
Posts: 881
Hi Richard,
Great project and a very nicely built prototype too.
Although I personally like the dance track version better!
...somehow a little distortion doesn't matter there and it's cool watching the modulation on the scope
The best vocal track I found to play through my singing tesla coil was "Sailboat" by Katie Mellua. It has a very clear and sharp vocal line which is quite dynamic too. Or anything with acoustic piano will show up the distortion if you are wanting material for a harsh test.
I used Rapture by Iio originally, but there's a lof of corona hiss in my demo at 250kHz.
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Completed Plasma Speaker / Tweeter
Keep it up! I recently finished my VTTC plasma tweeter, and the sound quality is great, however i used a digital camera video recorder, so the sound is awful in the recording! In real life, it really does sound quite fantastic 
