Tesla achieved resonance with freqvency of secundary in electrical sence, with carefully selected choice, to be exact - with adjusting dimensions of „Top-load“, capacitor (with ball or thorus shape) placed on the top of spiral.

Unipolar coil design widely used in modern coils. The primary is the flat red spiral winding at bottom, the secondary is the vertical cylindrical coil wound with fine red wire. The high-voltage terminal is the aluminum torus at the top of the secondary coil. …

Fig.2: Two flat spiral Tesla coils or “pancake” coils: a Transmitter (XMTR) and a Receiver (RCVR) both connected to the ground as described in Tesla’s Patent n.649621 from May 1900. The employ of quaternions by informatics increases computer calculation speed and allows memory space spare up to 55%, which is a

The energy at the outer lead of the flat spiral coil is that of a unified longitudinal wave where the electrostatic charges have completely rejoined. The energy at the terminal of the flat spiral is a split longitudinal wave with the charges held apart from each other.

However, a true Tesla coil (circa 1894) is a velocity inhibited slow -wave helical transmission line resonator : V max = S×V min , where S is the standing wave ratio. Voltage magnification is by standing waves.

The system originally proposed by Tesla [1] (Fig. 1) consisted of a transmitter including a resonant transformer with a strong elevation of potential: the high inductance spiral secondary coil, loaded by a low capacitance “elevated” metal sphere, was …

An ordinary transverse EM vector wave is thus two pair-coupled Tesla scalar longitudinal waves, and only a single special case of the much more fundamental electromagnetic discovered by Nikola Tesla. ...” “... scalar wave's velocity through the slightly dragging medium still may be

In Tesla's Wardencliffe magnifier, the frequency of the flat spiral coil was tuned to the earth's resonant frequency. The solenoid was wound to oscillate at many times the frequency of the earth such that it would generate high potential.

Flat Spiral Secondary And Longitudinal Waves Experiment. Reflecting on the nature of longitudinal waves, it occurred to me that a flat spiral secondary coil produces most of its power in the outer windings of the coil. This prevents a peak of high potential on the terminal capacitance.

The action of the partial transmission line standing wave of the Tesla coil, may be acting as an interface between the free space resistance of local space and the quantum ohm of non-local space.