Nikola Tesla Books
IN SEARCH OF NIKOLA TESLA capacitance, is self resonating close to the condition disclosed by Tesla. Tesla never made full theoretical analysis of his transformer but in tuning for the maximum secondary voltage he certainly used a 'cut and try method'. The coupling between the primary and secondary also plays important role and to these days electrical engineers only have an approximate theory of how this works. The best and most detailed Tesla's theory of his transformer can be found in his Colorado Springs Diary 1899-1900, published by Nikola Tesla Museum in Belgrade in 1978 as well as in several earlier patents and lectures. In looking through Tesla's lectures, papers and patents we discover why he wanted to produce as high a voltage as possible. His goal was to create 'electrostatic effects' when operating his evacuated tubes or single-wire bulbs with a single electrode, or when operating single-wire transmission system with an insulated plate that has to be at a high potential. In this system, one terminal of the high frequency Tesla coil is connected with a wire to one terminal of the receiver, and the other terminals at the transmitting and receiving sides are connected to the insulated plates. Amplifying on this scheme Tesla concluded that the earthed plates at the transmitting and receiving sides can replace the single connecting wire and the earth thus acts as the wire. This scheme he explained in his 1893 lecture in the USA, but he experimented with various transmitters antenna-ground connections in 1892. P B S Pâ Sâ Bâ Tesla's proposition from 1893: Sh.f. generator; B-ground plate; P-elevated plate (antenna). Receiver is tuned to the transmitter frequency A full explanation of his radio system, known as the four-tuned circuit, can be found in two patents submitted in September 1897. At that time, 155
