Sources of Current for Telegraph Transmitting Sets--An Experimental Continuous Wave Telegraph Transmitter--The Apparatus You Need--The Tuning Coil--The Condensers--The Aerial Ammeter--The Buzzer and Dry Cell--The Telegraph Key--The Vacuum Tube Oscillator--The Storage Battery--The Battery Rheostat--The Oscillation Choke Coil--Transmitter Connectors--The Panel Cutout--Connecting Up the Transmitting Apparatus--A 100-mile C. W. Telegraph Transmitter--The Apparatus You Need--The Tuning Coil--The Aerial Condenser--The Aerial Ammeter--The Grid and Blocking Condensers--The Key Circuit Apparatus--The 5 Watt Oscillator Vacuum Tube--The Storage Battery and Rheostat--The Filament Voltmeter--The Oscillation Choke Coil--The Motor-generator Set--The Panel Cut-out--The Protective Condenser--Connecting Up the Transmitting Apparatus--A 200-mile C. W. Telegraph Transmitter--A 500-mile C. W. Telegraph Transmitter--The Apparatus and Connections-- The 50-watt Vacuum Tube Oscillator--The Aerial Ammeter--The Grid Leak Resistance--The Oscillation Choke Coil--The Filament Rheostat--The Filament Storage Battery--The Protective Condenser--The Motor-generator--A 1000-mile C. W. Telegraph Transmitter.
[XVII. CONTINUOUS WAVE TELEGRAPH TRANSMITTING SETS WITH ALTERNATING CURRENT]
A 100-mile C. W. Telegraph Transmitting Set--The Apparatus Required--The Choke Coils--The Milli-ammeter--The A. C. Power Transformer--Connecting Up the Apparatus--A 200- to 500-mile C. W. Telegraph Transmitting Set-A 500- to 1000-mile C. W. Telegraph Transmitting Set--The Apparatus Required--The Alternating Current Power Transformer-Connecting Up the Apparatus.
[XVIII. WIRELESS TELEPHONE TRANSMITTING SETS WITH DIRECT AND ALTERNATING CURRENTS]
A Short Distance Wireless Telephone Transmitting Set--With 110-volt Direct Lighting Current--The Apparatus You Need--The Microphone Transmitter--Connecting Up the Apparatus--A 25- to 50-mile Wireless Telephone Transmitter--With Direct Current Motor Generator--The Apparatus You Need--The Telephone Induction Coil--The Microphone Transformer--The Magnetic Modulator--How the Apparatus is Connected Up--A 50- to 100-mile Wireless Telephone Transmitter--With Direct Current Motor Generator--The Oscillation Choke Coil--The Plate and Grid Circuit Reactance Coils--Connecting up the Apparatus--A 100- to 200-mile Wireless Telephone Transmitter--With Direct Current Motor Generator--A 50- to 100-mile Wireless Telephone Transmitting Set--With 100-volt Alternating Current--The Apparatus You Need--The Vacuum Tube Rectifier--The Filter Condensers--The Filter Reactance Coil-- Connecting Up the Apparatus--A 100- to 200-mile Wireless Telephone Transmitting Set--With 110-volt Alternating Current--Apparatus Required.
[XIX. THE OPERATION OF VACUUM TUBE TRANSMITTERS]
The Operation of the Vacuum Tube Oscillator--The Operation of C. W. Telegraph Transmitters with Direct Current--Short Distance C. W. Transmitter--The Operation of the Key Circuit--The Operation of C. W. Telegraph Transmitting with Direct Current--The Operation of C. W. Telegraph Transmitters with Alternating Current--With a Single Oscillator Tube--Heating the Filament with Alternating Current--The Operation of C. W. Telegraph Transmitters with Alternating Current-- With Two Oscillator Tubes--The Operation of Wireless Telephone Transmitters with Direct Current--Short Distance Transmitter--The Microphone Transmitter--The Operation of Wireless Telephone Transmitters with Direct Current--Long Distance Transmitters--The Operation of Microphone Modulators--The Induction Coil--The Microphone Transformer--The Magnetic Modulator--Operation of the Vacuum Tube as a Modulator--The Operation of Wireless Telephone Transmitters with Alternating Current--The Operation of Rectifier Vacuum Tubes--The Operation of Reactors and Condensers.
[XX. HOW TO MAKE A RECEIVING SET FOR $5.00 OR LESS.]
The Crystal Detector--The Tuning Coil--The Headphone--How to Mount the Parts--The Condenser--How to Connect Up the Receptor.