This circuit blows up in 25k seconds when the neon bulbs light up.
The neon bulbs do not cause this circuit to blow up. They merely
hasten this explosive outpouring of electrical energy due to their
contribution of negative impedance which this circuit is already
generating. I don't adhere to the term of "negative impedance"
since impedances and resistance always remains a positive value.
Instead, the inversion mathematically occurs with the resultant
voltage becoming an imaginary inversion of voltage leading to an
inversion of the input of subsequent instants. This leads to
negative watts when the amplitudes of both the input and the
output voltages dominates the amplitudes of both the input
and the output of real voltages.

Copper Wire Resistance Calculator + Wire Resistance Chart (4/0 To 40 AWG)
https://learnmetrics.com/wire-resistance-calculator-formula/

Magnetic Permeability: Definition, Formula, and Values
https://www.sciencefacts.net/magnetic-permeability.html#:~:text=Ferromagnetic%3A%20Ferromagnetic%20materials%20such%20as%20iron%2C%20nickel%2C%20and,becoming%20magnetized%20when%20exposed%20to%20a%20magnetic%20field.

Circumference Calculator
https://www.omnicalculator.com/math/circumference

Coil Inductance Calculator - Engineering Calculators & Tools
https://www.allaboutcircuits.com/tools/coil-inductance-calculator/

https://vinyasi.info/realsim