I'm fairly familiar with Tesla and have a lot of notes on him, his work and some of his actual notes (copies) from Colorado Springs and several books on him. I forget where this came from but I had copied this into some of my notes:
" In 1895, while conducting research with his step-up transformer, Nikola Tesla had his first indications that time and space could be influenced by using highly charged, rotating magnetic fields. Part of this revelation came about from Tesla's experimentation with radio frequencies and the transmission of electrical energy through the atmosphere. Tesla's simple discovery would, years later, lead to the infamous Philadelphia Experiment and the Montauk time travel projects. But even before these highly top-secret military programs came about, Tesla made some fascinating discoveries on the nature of time and the real possibilities of time travel.
With these experiments in high-voltage electricity and magnetic fields, Tesla discovered that time and space could be breached, or warped, creating a "doorway" that could lead to other time frames. But with this monumental discovery, Tesla also discovered, through personal experience, the very real dangers inherent with time travel.
Tesla's first brush with time travel came in March 1895. A reporter for the New York Herald wrote on March 13 that he came across the inventor in a small café, looking shaken after being hit by 3.5 million volts, "I am afraid," said Tesla, "that you won't find me a pleasant companion tonight. The fact is I was almost killed today. The spark jumped three feet through the air and struck me here on the right shoulder. If my assistant had not turned off the current instantly in might have been the end of me."
Tesla, on contact with the resonating electromagnetic charge, found himself outside his time-frame reference. He reported that he could see the immediate past - present and future, all at once. But he was paralyzed within the electromagnetic field, unable to help himself. His assistant, by turning off the current, released Tesla before any permanent damage was done. A repeat of this very incident would occur years later during the Philadelphia Experiment. "
Many of Tesla's notes were confiscated upon his death and although most think the FBI took them the FBI claims they do not have them. I suspect someone higher up the totem pole took them from the FBI