Letters of a Radio-Engineer to His Son

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John Mills. Letters of a Radio-Engineer to His Son

Letters of a Radio-Engineer to His Son

Table of Contents

LETTERS OF A RADIO-ENGINEER TO HIS SON

3LETTER 1. ELECTRICITY AND MATTER

9LETTER 2. WHY A COPPER WIRE WILL CONDUCT ELECTRICITY

16LETTER 3. HOW A BATTERY WORKS

27LETTER 4. THE BATTERIES IN YOUR RADIO SET

34LETTER 5. GETTING ELECTRONS FROM A HEATED WIRE

40LETTER 6. THE AUDION

49LETTER 7. HOW TO MEASURE AN ELECTRON STREAM

58LETTER 8. ELECTRON-MOVING-FORCES

67LETTER 9. THE AUDION-CHARACTERISTIC

78LETTER 10. CONDENSERS AND COILS

87LETTER 11. A “C-W” TRANSMITTER

97LETTER 12. INDUCTANCE AND CAPACITY

114LETTER 13. TUNING

126LETTER 14. WHY AND HOW TO USE A DETECTOR

142LETTER 15. RADIO-TELEPHONY

154LETTER 16. THE HUMAN VOICE

167LETTER 17. GRID BATTERIES AND GRID CONDENSERS FOR DETECTORS

176LETTER 18. AMPLIFIERS AND THE REGENERATIVE CIRCUIT

187LETTER 19. THE AUDION AMPLIFIER AND ITS CONNECTIONS

199LETTER 20. TELEPHONE RECEIVERS AND OTHER ELECTROMAGNETIC DEVICES

212LETTER 21. YOUR RECEIVING SET AND HOW TO EXPERIMENT

230LETTER 22. HIGH-POWERED RADIO-TELEPHONE TRANSMITTERS

242LETTER 23. AMPLIFICATION AT INTERMEDIATE FREQUENCIES

251LETTER 24. BY WIRE AND BY RADIO

Отрывок из книги

John Mills

Published by Good Press, 2019

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It’s these wandering electrons which are affected when a battery is connected to a copper wire. Every single electron which is away from its home group, and wandering around, is sent scampering along toward the end of the wire which is connected to the positive plate or terminal of the battery and away from the negative plate. That’s what the battery does to them for being away from home; it drives them along the wire. There’s a regular stream or procession of them from the negative end of the wire toward the positive. When we have a stream of electrons like this we say we have a current of electricity.

We’ll need to learn more later about a current of electricity but one of the first things we ought to know is how a battery is made and why it affects these wandering electrons in the copper wire. That’s what I shall tell you in my next letter.[1]

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