My goal is to have a SSTC to act as a plasma speaker. Based on your reply and additional research into the flyback design, I found that it will give me a better audio sample and the design is somewhat easier than the air-core transformer design but I feel as though I am cheating myself and I am not getting the full Tesla Coil design experience. I am in the process of switching my design to using an air-core transformer using a sphere top load. What supply voltage do I need in order to operate the coil? I have seen many sites that use a 12Vdc supply to power their SSTCs while others use high voltage transformers (NST in particular). I am looking to produce sparks of 30cm and I feel that using a 12Vdc supply will not give me enough power to achieve this.
: --Previous Message--
: Hello, I am new to Tesla Coils and I am in process of designing one using
: flyback transformer. I am curious whether I can have a duel resonance
: between the primary and secondary since the transformer is already wound
: and I have no control over the inductance. Also is it possible for it to
: look like the 'classical' tesla coil with a slender middle that goes to a
: toroid top load? Most of the designs that I have seen using a flyback only
: have small arcs from a pointed electrode.
: Hi Josh,
: The complex geometry of the secondary winding is not optimum for getting
: the sharply defined resonant frequency that's desirable for a Tesla Coil.
: Various sections of the secondary "Pi" winding will combine with
: various parasitic turn-to-turn capacitances to create various combinations
: of LC circuits inside the winding. So, instead of getting a single (and
: optimal) resonant frequency, you'll get a variety of suboptimal resonant
: frequencies. These separate resonant frequencies only excite subsections
: of the winding, but not the entire winding (as in a Tesla Coil).
: Although you can tune the primary so that it is tuned to one of these
: suboptimal frequencies, the output will be disappointing when compared to
: a classic Tesla Coil. You also risk internal arcing as some sections of
: the winding can become overstressed. Once the winding insulation system
: fails, the winding is destroyed and must be rewound or the transformer
: replaced. Flybacks are good for low to moderate output power applications.
: There are many circuits on the Internet that will drive flybacks to
: deliver tens or even hundreds of watts of output power. You may wish to
: search the forum section on the 4hv site: <a
: If you search for "flyback driver" on the 4hv site, you can also
: read numerous discussions about flyback transformers, driver circuits, and
: results obtained from a variety of experimenters. You may also wish to
: read the HV Wiki to read about Flyback Transformers:
: Good luck and best wishes,