Self running coil?

[gotoluc]

@gotoluc

I like this composite waveform...it's nice and placid. The toroid coil
is constant running at resonant pure sinewave f and is pumped by the
gate at resonating 2f damped at 50% oscillation.

It might be interesting to try to boost the gate to 4f.

:S:MarkSCoffman

Hi Mark,

I have no schooling in electronics or even regular school for that matter. What I know at this time was learned by trial and error. So unfortunately I don't know what the term 2f and 4f means.

If you care to explain more I may get it ... or not

Thanks

Luc

[derricka]

2F and 4F refer to harmonics of the main frequency.  For example, the 2F harmonic of 60Hz is 120Hz, and the 4F harmonic would be 240Hz.  Square waves, or other non sinusoidal waves, can be considered to be the sum of a fundamental frequency plus harmonics. Spectrum analyzers give you this kind of view, breaking up a complex wave into it's component frequencies.

[gotoluc]

2F and 4F refer to harmonics of the main frequency.  For example, the 2F harmonic of 60Hz is 120Hz, and the 4F harmonic would be 240Hz.  Square waves, or other non sinusoidal waves, can be considered to be the sum of a fundamental frequency plus harmonics. Spectrum analyzers give you this kind of view, breaking up a complex wave into it's component frequencies.

Thanks derricka for taking the time to explain what that term means.

Luc

[gravityblock]

@gotoluc

I like this composite waveform...it's nice and placid. The toroid coil
is constant running at resonant pure sinewave f and is pumped by the
gate at resonating 2f damped at 50% oscillation.

It might be interesting to try to boost the gate to 4f.

:S:MarkSCoffman

Does this have anything to do with parametric resonance?  If not, then could parametric resonance be beneficial to this system.

Parametric resonance occurs in a system when a it is parametrically excited and oscillates at one of its resonant frequencies.  Parametric resonance takes place when the external excitation frequency equals to twice the natural frequency of the system. Parametric excitation differs from forcing since the action appears as a time varying modification on a system parameter.

http://en.wikipedia.org/wiki/Parametric_resonance

Thanks,

GB

[forest]

YES YES YES Parametric resonance !
When we combine it with some kinds of amplifiers we will have OU.