Useful Information--[Glossary]--[Wireless Don'ts].
LIST OF FIGURES
- [Fig. 1.]--Simple Receiving Set
- [Fig. 2.]--Simple Transmitting Set
- [(A) Fig. 3.]--Flat Top, or Horizontal Aerial
- [(B) Fig. 3.]--Inclined Aerial
- [(A) Fig. 4.]--Inverted L Aerial
- [(B) Fig. 4.]--T Aerial
- [Fig. 5.]--Material for a Simple Aerial Wire System
- [(A) Fig. 6.]--Single Wire Aerial for Receiving
- [(B) Fig. 6.]--Receiving Aerial with Spark Gap Lightning Arrester
- [(C) Fig. 6.]--Aerial with Lightning Switch
- [Fig. 7.]--Two-wire Aerial
- [(A) Fig. 8.]--Part of a Good Aerial
- [(B) Fig. 8.]--The Spreaders
- [(A) Fig. 9.]--The Middle Spreader
- [(B) Fig. 9.]--One End of Aerial Complete
- [(C) Fig. 9.]--The Leading in Spreader
- [(A) Fig. 10.]--Cross Section of Crystal Detector
- [(B) Fig. 10.]--The Crystal Detector Complete
- [(A) Fig. 11.]--Schematic Diagram of a Double Slide Tuning Coil
- [(B) Fig. 11.]--Double Slide Tuning Coil Complete
- [(A) Fig. 12.]--Schematic Diagram of a Loose Coupler
- [(B) Fig. 12.]--Loose Coupler Complete
- [(A) Fig. 13.]--How a Fixed Receiving Condenser is Built up
- [(B) Fig. 13.]--The Fixed Condenser Complete
- [(C) and (D) Fig. 13.]--Variable Rotary Condenser
- [Fig. 14.]--Pair of Wireless Headphones
- [(A) Fig. 15.]--Top View of Apparatus Layout for Receiving Set No. 1
- [(B) Fig. 15.]--Wiring Diagram for Receiving Set No. 1
- [(A) Fig. 16.]--Top View of Apparatus Layout for Receiving Set No. 2
- [(B) Fig. 16.]--Wiring Diagram for Receiving Set No. 2
- [Fig. 17.]--Adjusting the Receiving Set
- [(A) and (B) Fig. 18.]--Types of Spark Coils for Set No. 1
- [(C) Fig. 18.]--Wiring Diagram of Spark Coil
- [Fig. 19.]--Other Parts for Transmitting Set No. 1
- [(A) Fig. 20.]--Top View of Apparatus Layout for Sending Set No. 1
- [(B) Fig. 20.]--Wiring of Diagram for Sending Set No. 1
- [Fig. 21.]--Parts for Transmitting Set No. 2
- [(A) Fig. 22.]--Top View of Apparatus Layout for Sending Set No. 2
- [(B) Fig. 22.]--Wiring Diagram for Sending Set No. 2
- [Fig. 23.]--Using a 110-volt Direct Current with an Alternating current Transformer
- [Fig. 24.]--Principle of the Hot Wire Ammeter
- [Fig. 25.]--Kinds of Aerial Switches
- [Fig. 26.]--Wiring Diagram for a Complete Sending and Receiving Set No. 1
- [Fig. 27.]--Wiring Diagram for Complete Sending and Receiving Set No. 2
- [Fig. 28.]--Water Analogue for Electric Pressure
- [Fig. 29.]--Water Analogues for Direct and Alternating Currents
- [Fig. 30.]--How the Ammeter and Voltmeter are Used
- [Fig. 31.]--Water Valve Analogue of Electric Resistance
- [(A) and (B) Fig. 32.]--How an Electric Current is Changed into Magnetic Lines of Force and These into an Electric Current
- [(C) and (D) Fig. 32.]--How an Electric Current Sets up a Magnetic Field
- [Fig. 33.]--The Effect of Resistance on the Discharge of an Electric Current
- [Fig. 34.]--Damped and Sustained Mechanical Vibrations
- [Fig. 35.]--Damped and Sustained Electric Oscillations
- [Fig. 36.]--Sound Wave and Electric Wave Tuned Senders and Receptors
- [Fig. 37.]--Two Electrode Vacuum Tube Detectors
- [Fig. 38.]--Three Electrode Vacuum Tube Detector and Battery Connections
- [Fig. 39.]--A and B Batteries for Vacuum Tube Detectors
- [Fig. 40.]--Rheostat for the A or Storage-battery Current
- [(A) Fig. 41.]--Top View of Apparatus Layout for Vacuum Tube Detector Receiving Set
- [(B) Fig. 41.]--Wiring Diagram of a Simple Vacuum Tube Receiving Set
- [Fig. 42.]--Grid Leaks and How to Connect them Up
- [Fig. 43.]--Crystal Detector Receiving Set with Vacuum Tube Amplifier (Resistance Coupled)
- [(A) Fig. 44.]--Vacuum Tube Detector Receiving Set with One Step Amplifier (Resistance Coupled)
- [(B) Fig. 44.]--Wiring Diagram for Using One A or Storage Battery with an Amplifier and a Detector Tube
- [(A) Fig. 45.]--Wiring Diagram for Radio Frequency Transformer Amplifying Receiving Set
- [(B) Fig. 45.]--Radio Frequency Transformer
- [(A) Fig. 46.]--Audio Frequency Transformer
- [(B) Fig. 46.]--Wiring Diagram for Audio Frequency Transformer Amplifying Receiving Set. (With Vacuum Tube Detector and Two Step Amplifier Tubes)
- [(A) Fig. 47.]--Six Step Amplifier with Loop Aerial
- [(B) Fig. 47.]--Efficient Regenerative Receiving Set (With Three Coil Loose Coupler Tuner)
- [Fig. 48.]--Simple Regenerative Receiving Set (With Loose Coupler Tuner)
- [(A) Fig. 49.]--Diagram of Three Coil Loose Coupler
- [(B) Fig. 49.]--Three Coil Loose Coupler Tuner
- [Fig. 50.]--Honeycomb Inductance Coil
- [Fig. 51.]--The Use of the Potentiometer
- [Fig. 52.]--Regenerative Audio Frequency Amplifier Receiving Set
- [Fig. 53.]--How the Vario Coupler is Made and Works
- [Fig. 54.]--How the Variometer is Made and Works
- [Fig. 55.]--Short Wave Regenerative Receiving Set (One Variometer and Three Variable Condensers)
- [Fig. 56.]--Short Wave Regenerative Receiving Set (Two Variometer and Two Variable Condensers)
- [Fig. 57.]--Wiring Diagram Showing Fixed Loading Coils for Intermediate Wave Set
- [Fig. 58.]--Wiring Digram of Intermediate Wave Receptor with One Vario Coupler and 12 Section Bank-wound Inductance Coil
- [Fig. 59.]--Wiring Diagram Showing Long Wave Receptor with Vario Couplers and 8 Bank-wound Inductance Coils
- [Fig. 60.]--Wiring Diagram of Long Wave Autodyne, or Self-heterodyne Receptor (Compare with Fig. 77)
- [Fig. 61.]--Wiring Diagram of Long Wave Separate Heterodyne Receiving Set
- [Fig. 62.]--Cross Section of Bell Telephone Receiver
- [Fig. 63.]--Cross Section of Wireless Headphone
- [Fig. 64.]--The Wireless Headphone
- [Fig. 65.]--Arkay Loud Speaker
- [Fig. 66.]--Amplitone Loud Speaker
- [Fig. 67.]--Amplitron Loud Speaker
- [Fig. 68.]--Magnavox Loud Speaker
- [Fig. 69.]--Schematic Diagram of an Atom
- [Fig. 70.]--Action of Two-electrode Vacuum Tube
- [(A) and (B) Fig. 71.]--How a Two-electrode Tube Acts as Relay or a Detector
- [(C) Fig. 71.]--Only the Positive Part of Oscillations Goes through the Tube
- [(A) and (B) Fig. 72.]--How the Positive and Negative Voltages of the Oscillations Act on the Electrons
- [(C) Fig. 72.]--How the Three-electrode Tube Acts as Detector and Amplifier
- [(D) Fig. 72.]--How the Oscillations Control the Flow of the Battery Current through the Tube
- [Fig. 73.]--How the Heterodyne Receptor Works
- [Fig. 74.]--Separate Heterodyne Oscillator
- [(A) Fig. 75.]--Apparatus for Experimental C. W. Telegraph Transmitter.
- [(B) Fig. 75.]--Apparatus for Experimental C. W. Telegraph Transmitter.
- [Fig. 76.]--Experimental C. W. Telegraph Transmitter
- [Fig. 77.]--Apparatus of 100-mile C. W. Telegraph Transmitter
- [Fig. 78.]--5- to 50-watt C. W. Telegraph Transmitter (with a Single Oscillation Tube)
- [Fig. 79.]--200-mile C. W. Telegraph Transmitter (with Two Tubes in Parallel)
- [Fig. 80.]--50-watt Oscillator Vacuum Tube
- [Fig. 81.]--Alternating Current Power Transformer (for C. W. Telegraphy and Wireless Telephony)
- [Fig. 82.]--Wiring Diagram for 200- to 500-mile C. W. Telegraph Transmitting Set. (With Alternating Current.)
- [Fig. 83.]--Wiring Diagram for 500- to 1000-mile C. W. Telegraph Transmitter
- [Fig. 84.]--Standard Microphone Transmitter
- [Fig. 85.]--Wiring Diagram of Short Distance Wireless Telephone Set. (Microphone in Aerial Wire.)
- [Fig. 86.]--Telephone Induction Coil (used with Microphone Transmitter).
- [Fig. 87.]--Microphone Transformer Used with Microphone Transmitter
- [Fig. 88.]--Magnetic Modulator Used with Microphone Transmitter
- [(A) Fig. 89.]--Wiring Diagram of 25--to 50-mile Wireless Telephone. (Microphone Modulator Shunted Around Grid-leak Condenser)
- [(B) Fig. 89.]--Microphone Modulator Connected in Aerial Wire
- [Fig. 90.]--Wiring Diagram of 50- to 100-mile Wireless Telephone Transmitting Set
- [Fig. 91.]--Plate and Grid Circuit Reactor
- [Fig. 92.]--Filter Reactor for Smoothing Out Rectified Currents
- [Fig. 93.]--100- to 200-mile Wireless Telephone Transmitter
- [(A) and (B) Fig. 94.]--Operation of Vacuum Tube Oscillators
- [(C) Fig. 94.]--How a Direct Current Sets up Oscillations
- [Fig. 95.]--Positive Voltage Only Sets up Oscillations
- [Fig. 96.]--Rasco Baby Crystal Detector
- [Fig. 97.]--How the Tuning Coil is Made
- [Fig. 98.]--Mesco loop-ohm Head Set
- [Fig. 99.]--Schematic Layout of the $5.00 Receiving Set
- [Fig. 100.]--Wiring Diagram for the $5.00 Receiving Set
LIST OF ILLUSTRATIONS
- Frederick Collins, Inventor of the Wireless Telephone, 1899. Awarded Gold Medal for same, Alaska Yukon Pacific Exposition, 1909
- Collins' Wireless Telephone Exhibited at the Madison Square Garden, October, 1908
- General Pershing "Listening-in"
- The World's Largest Radio Receiving Station. Owned by the Radio Corporation of America at Rocky Point near Port Jefferson, L. I.
- First Wireless College in the World, at Tufts College, Mass
- Alexander Graham Bell, Inventor of the Telephone, now an ardent Radio Enthusiast
- World's Largest Loud Speaker ever made. Installed in Lytle Park, Cincinnati, Ohio, to permit President Harding's Address at Point Pleasant, Ohio, during the Grant Centenary Celebration to be heard within a radius of one square
- United States Naval High Power Station, Arlington, Va. General view of Power Room. At the left can be seen the Control Switchboards, and overhead, the great 30 K.W. Arc Transmitter with Accessories
- The Transformer and Tuner of the World's Largest Radio Station. Owned by the Radio Corporation of America at Rocky Point near Port Jefferson, L. I.
- Broadcasting Government Reports by Wireless from Washington. This shows Mr. Gale at work with his set in the Post Office Department
- Wireless Receptor, the size of a Safety Match Box. A Youthful Genius in the person of Kenneth R. Hinman, who is only twelve years old, has made a Wireless Receiving Set that fits neatly into a Safety Match Box. With this Instrument and a Pair of Ordinary Receivers, he is able to catch not only Code Messages but the regular Broadcasting Programs from Stations Twenty and Thirty Miles Distant
- Wireless Set made into a Ring, designed by Alfred G. Rinehart, of Elizabeth, New Jersey. This little Receptor is a Practical Set; it will receive Messages, Concerts, etc., measures 1" by 5/8" by 7/8". An ordinary Umbrella is used as an Aerial
[CHAPTER I]
HOW TO BEGIN WIRELESS
In writing this book it is taken for granted that you are: first, one of the several hundred thousand persons in the United States who are interested in wireless telegraphy and telephony; second, that you would like to install an apparatus in your home, and third, that it is all new to you.
Now if you live in a city or town large enough to support an electrical supply store, there you will find the necessary apparatus on sale, and someone who can tell you what you want to know about it and how it works. If you live away from the marts and hives of industry you can send to various makers of wireless apparatus [Footnote: A list of makers of wireless apparatus will be found in the [Appendix].] for their catalogues and price-lists and these will give you much useful information. But in either case it is the better plan for you to know before you start in to buy an outfit exactly what apparatus you need to produce the result you have in mind, and this you can gain in easy steps by reading this book.
Kinds of Wireless Systems.--There are two distinct kinds of wireless systems and these are: the wireless telegraph system, and the wireless telephone system. The difference between the wireless telegraph and the wireless telephone is that the former transmits messages by means of a telegraph key, and the latter transmits conversation and music by means of a microphone transmitter. In other words, the same difference exists between them in this respect as between the Morse telegraph and the Bell telephone.