In the 1860s, radio waves were predicted by James Clerk Maxwell in his work on electromagnetism. It took a further twenty years for the first experiments to produce a working demonstration. In this guide to radio technology, first published in 1925, eminent physicist Sir Oliver Lodge (1851-1940) provides a concise history of the development of the wireless radio, explains the theory behind it, and includes some practical tips for amateurs. Having lived through and contributed to the discovery, he explains the difficulty of the early experiments, which took place in a time when terms like…mehr
In the 1860s, radio waves were predicted by James Clerk Maxwell in his work on electromagnetism. It took a further twenty years for the first experiments to produce a working demonstration. In this guide to radio technology, first published in 1925, eminent physicist Sir Oliver Lodge (1851-1940) provides a concise history of the development of the wireless radio, explains the theory behind it, and includes some practical tips for amateurs. Having lived through and contributed to the discovery, he explains the difficulty of the early experiments, which took place in a time when terms like 'frequency' and 'inductance', now taken for granted, did not exist in the scientific vocabulary. His first-hand account reveals the incredible efforts poured into the development of a revolutionary modern technology, rekindling the sense of wonder that once surrounded this strange new science.
Preface Introduction Part I. Radio in General: 1. On broadcasting 2. Early pioneering work in radio waves 3. The discovery of the waves 4. The development of radiotelegraphy 5. Wireless achievement and anticipation 6. Vast range of ether vibrations 7. The transmission of wireless waves 8. Wave peculiarities 9. On the general theory of ether waves 10. Earth transmission 11. The Heaviside layer Part II. Details that Make for Efficiency: 12. Some points about capacity and inductance 13. Conditions for maximum inductance 14. The importance of good contact 15. Advantage of low resistance and stranded wire 16. Some disadvantages of reaction 17. Stray capacities and couplings 18. The use of iron in transformers 19. Contrasting methods of aerial excitation 20. Phase difference in different kinds of coupling 21. The grid as traffic regulator Part III. Calculations for Amateur Constructors: 22. Comparison of the absolute magnitudes of capacity and inductance 23. A plea for easy specification 24. On self-induction and its maximum value 25. Desiderata for inductance coil of receiver 26. How to calculate the conductance of coils 27. On the use of a simple formula for maximum inductance 28. To estimate the capacity of an aerial 29. Calculation of aerial capacity 30. On the damping of vibrations by coils of wire 31. The romance of wireless Index.
Preface Introduction Part I. Radio in General: 1. On broadcasting 2. Early pioneering work in radio waves 3. The discovery of the waves 4. The development of radiotelegraphy 5. Wireless achievement and anticipation 6. Vast range of ether vibrations 7. The transmission of wireless waves 8. Wave peculiarities 9. On the general theory of ether waves 10. Earth transmission 11. The Heaviside layer Part II. Details that Make for Efficiency: 12. Some points about capacity and inductance 13. Conditions for maximum inductance 14. The importance of good contact 15. Advantage of low resistance and stranded wire 16. Some disadvantages of reaction 17. Stray capacities and couplings 18. The use of iron in transformers 19. Contrasting methods of aerial excitation 20. Phase difference in different kinds of coupling 21. The grid as traffic regulator Part III. Calculations for Amateur Constructors: 22. Comparison of the absolute magnitudes of capacity and inductance 23. A plea for easy specification 24. On self-induction and its maximum value 25. Desiderata for inductance coil of receiver 26. How to calculate the conductance of coils 27. On the use of a simple formula for maximum inductance 28. To estimate the capacity of an aerial 29. Calculation of aerial capacity 30. On the damping of vibrations by coils of wire 31. The romance of wireless Index.
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