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.