My first simple HFSSTC

[PowerTech]

Made my first Tesla Coil
I chose self-oscillating HFSSTC, easy looking at first sight, but little bit tricky to fine tune.
At first launch i got very little unstable flame, after tuning primary coil i got more or less good configuration that produce about 4 cm "brush flame", these results motivated me for future experiments.







Resonator has ~155 turns/0.7mm wire, L = 6 turns/1.13mm wire, C = 100pF, Lf = 9.5uH, mosfet - IRFP460.
Power supply is 230/110V transformer, after bridge rectifier no filtering capacitors present, only 22uF added to HFSSTC input, therefore, i think, flame become bushy and produce loud 100Hz sound.
Used "soft start", at beginning transformer is connected in series with 200W ballast(PTC heater), then pressing a button contactor shorts the ballast and connects transformer directly to AC mains.
I don’t measured DC voltage, AC voltage before bridge rectifier is 110V, power consumption is 330W.

[曹靖]

Great machine! The effect is also good! If you want to improve the efficiency of the machine, lower the heating and longer the arc, you can read Steve Ward's paper and hope it can help you https://docs.google.com/document/d/1-jMPQOSs6-Flp181TTa8cNMSs2XumzDEahg9DVD0hKk/edit?usp=sharing

[PowerTech]

Thank U.
And thank U again for great information link.