Nikola Tesla Books
CHAPTER THREE ence patterns were closely analysed, they were found to occur in pulses repeated at regular intervals â machine-gun bursts of power. The frequency of these pulses lay between five and fifteen times a second - the Tesla frequency! Clearly, secret electrical experiments were taking place in Russia. But were there other possible explanations before a Tesla transmitter was invoked? RADIO INTERFERENCE The frequencies used by international short wave broadcasting stations lie between 4.5 megahertz (four and a half mil lion cycles per second) and 30 MHz. Most stations are grouped into 'bands' of frequencies between these two limits. In terms of wavelengths, these are the 11, 13, 16, 19, 25, 31, 41, 49, and 60 metre bands. Radio hams, marine radios and aircraft make use of lower frequencies in the 1.6 to 4.4 MHz range and even lower frequencies are used for conventional AM broadcasts. The peculiar interference signals monitored in April of 1977, for example, were observed at around 6, 7, 8, 9, 10, 11, 12, 18, 20 and 21 MHz which places them well within the international short wave spectrum. The interference itself consisted of regularly repeated bursts of pulses of electrical energy and had considerable strength. During the April, 1977 monitoring period, the pulse rate was at 9.615 Hz and, at other periods, bursts of pulses occurred five to fifteen times per second. These frequencies are all within the range of the natural resonant frequency of the earth itself - the Schumann Resonance. Triangulation of the signals indicated that their origin was somewhere in the neighbourhood of Riga, in Latvia. 34
