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The Tesla Notes

Tesla Notes 17: The Magnifying Transmitter (Colorado Springs, 1899)

A barn on a plateau, a coil fifteen metres across, a free coil standing on a driven one, and the long work of finding its pitch.

Tesla's 1899 Colorado Springs notebook: the extra coil as a quarter wave, why a ball on top lowers its pitch, and three ways he measured capacity.

Nikola Tesla November 5, 2026 28 min

#Nikola Tesla #Tesla Notes #Electromagnetism #Tesla Coil #Resonance #Colorado Springs #History of Physics

The Tesla Notes

Tesla Notes 12: The Oscillation Transformer, or the Coil (1891)

Why the induction coil fails at high frequency, and how a condenser, a spark and two tuned circuits without iron became the Tesla coil of patent 454,622.

Tesla tunes two coils without iron, derives their two frequencies and the voltage gain √(L₂/L₁), and files patent 454,622 for the coil.

Nikola Tesla November 5, 2026 28 min

#Nikola Tesla #Tesla Notes #Tesla coil #Resonance #Coupled circuits #Electromagnetism #History of science