Wireless Telegraphy and High Frequency Electricity Manual Containing Detailed, Information for the ConStruction of Transformers, Wireless Telegraph ... Their Theory and Operation (Classic Reprint)

In this chapter the method of practically calculating capacities and inductances is given, whereby the wave length and frequency of the station can be calculated. By this method instruments can also be calibrated. The subject is not touched upon historically, and the presentation of a great variety of systems and their names is avoided. Only the fundamental principles are considered. Selective tuning has not been attempted, since it is complicated, and as yet little understood, but it is the problem in wireless telegraphy and telephony today. Without it they have reached their limit and commercial success is impossible unless selective tuning is practicable. I desire to acknowledge my indebtedness to the boys of Los A ngeles, who have worked with me in this fascinating field. Many useful things have been developed at their suggestion. The following boys deserve special mention: Roy Zoll, A. E. A brams and Parke Hyde. Roy Zoll is one of the pioneers in this field in Los A ngeles, and he has done some excellent long distance work. Parke Hdye has been especially active in the construction and operation of high frequency apparatus. Dean Farran, Walter Cooper and George Roalfe put up the aerial on the Polytechnic High School, and Dean Farran has done some excellent long distance work with the station established there. The mechanical drawings are the product of -the boys of the Polytechnic High School, the most of them being made byS idney Twining, who also constructed some of the apparatus. I wish also to express my appreciation for the help and suggestions of Mr. J. T. LaD u, and Mr. E. J. Ovington, in the field of high frequency electricity. Mr. Ovington suggested the dimensions of the Tesla coils andO udin resonators that have proved so successful. The following works have been freely consulted in the preparation of this bocrk: The Principles of Electric Wave
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