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Updated: May 21, 2025
One of the ends of the secondary of the induction coil, or the microphone transformer, or the magnetic modulator is connected to the grid circuit and the other end to clip 3 of the tuning coil. A 100 to 200 Mile Wireless Telephone Transmitter With Direct Current Motor Generator.
One of the ends of the secondary of the induction coil, or the microphone transformer, or the magnetic modulator is connected to the grid circuit and the other end to clip 3 of the tuning coil. A 100 to 200 Mile Wireless Telephone Transmitter With Direct Current Motor Generator.
The only differences between this and the preceding transmitter are: the magnetic modulator, if you use one, should have an output of 3-1/2 to 5 amperes; you will need two 50 watt oscillator tubes with sockets; two 150 watt rectifier tubes with sockets; an aerial ammeter that reads to 5 amperes; three 1 mfd. filter condensers in parallel; two filter condensers of 1 mfd. capacitance that will stand 1750 volts; and a 300 milliampere filter reactor.
The only difference between this transmitter and the preceding one is that: two 5 watt tubes are used, the first serving as an oscillator and the second as a modulator; an oscillation choke coil is used in the plate circuit; a reactance coil or reactor, is used in the plate circuit; and a reactor is used in the grid circuit. The Oscillation Choke Coil.
This is an induction coil that is designed especially for wireless telephone modulation. The Magnetic Modulator. This piece of apparatus is also called a magnetic amplifier. The iron core is formed of very thin plates, or laminations as they are called, and this permits high-frequency oscillations to surge in a coil wound on it.
How the Apparatus Is Connected Up. Now there are three different ways that the microphone and its modulator can be connected in circuit.
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