These notes provide a basic introduction to the theory of solenoid resonance, with the emphasis on Tesla secondary resonators. The solenoid is described in terms of distributed physical reactance functions and these are used to derive the differential equations for the solenoid. The solutions relevant to Tesla secondary operation are examined and proper definitions are given for the effective capacitance and inductance of the coil.

The reader will require some familiarity with calculus and phasor notation, in addition to a general appreciation of the elementary laws of electromagnetism and circuit theory.

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