How Transmitting Set No. 1 Works--The Battery and Spark Coil Circuit--Changing the Primary Spark Coil Current Into Secondary Currents--What Ratio of Transformation Means--The Secondary Spark Coil Circuit--The Closed Oscillation Circuit--How Transmitting Set No. 2 Works-With Alternating Current--With Direct Current--The Rotary Spark Gap--The Quenched Spark Gap--The Oscillation Transformer--How Receiving Set No. 1 Works--How Receiving Set No. 2 Works.
[VII. MECHANICAL AND ELECTRICAL TUNING]
Damped and Sustained Mechanical Vibrations--Damped and Sustained Oscillations--About Mechanical Tuning--About Electric Tuning.
[VIII. A SIMPLE VACUUM TUBE DETECTOR RECEIVING SET]
Assembled Vacuum Tube Receiving Set--A Simple Vacuum Tube Receiving Set--The Vacuum Tube Detector--Three Electrode Vacuum Tube Detector--The Dry Cell and Storage Batteries--The Filament Rheostat--Assembling the Parts--Connecting Up the Parts--Adjusting the Vacuum Tube Detector Receiving Set.
[IX. VACUUM TUBE AMPLIFIER RECEIVING SETS]
A Grid Leak Amplifier Receiving Set. With Crystal Detector--The Fixed Resistance Unit, or Grid Leak--Assembling the Parts for a Crystal Detector Set--Connecting up the Parts for a Crystal Detector--A Grid Leak Amplifying Receiving Set With Vacuum Tube Detector--A Radio Frequency Transformer Amplifying Receiving Set--An Audio Frequency Transformer Amplifying Receiving Set--A Six Step Amplifier Receiving Set with a Loop Aerial--How to Prevent Howling.
[X. REGENERATIVE AMPLIFICATION RECEIVING SETS]
The Simplest Type of Regenerative Receiving Set--With Loose Coupled Tuning Coil--Connecting Up the Parts--An Efficient Regenerative Receiving Set. With Three Coil Loose Coupler--The A Battery Potentiometer--The Parts and How to Connect Them Up--A Regenerative Audio Frequency Amplifier--The Parts and How to Connect Them Up.