Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 19, 2025
You will observe: that the terminals of the power transformer secondary coil which develops 10 volts are connected to the filaments of the oscillator tubes; that the terminals of the other secondary coil which develops 10 volts are connected with the filaments of the rectifier tubes; that the terminals of the third secondary coil which develops 550 volts are connected with the plates of the rectifier tubes; that the pair of filter condensers are connected in parallel and these are connected to the mid-taps of the two filament secondary coils; that the reactance coil and the third filter condenser are connected together in series and these are shunted across the filter condensers, which are in parallel; and, finally, a lead connects the mid-tap of the 550-volt secondary coil of the power transformer with the connection between the reactor and the third filter condenser.
The pulsating direct currents are then passed through a filtering reactance coil, called a reactor, and one or more condensers, and these smooth them out until they approximate a continuous direct current.
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.
For this telephone transmitting set you need: one aerial ammeter; one tuning coil; one telephone modulator; one aerial series condenser; one 4 cell dry battery or a 6 volt storage battery; one microphone transmitter; one battery switch; one grid condenser; one grid leak; two 5 watt oscillator tubes with sockets; one blocking condenser; one oscillation choke coil; two filter condensers; one filter reactance coil; an alternating current power transformer, and two 20 watt rectifier vacuum tubes.
For this telephone transmitting set you need: one aerial ammeter; one tuning coil; one telephone modulator; one aerial series condenser; one 4 cell dry battery or a 6 volt storage battery; one microphone transmitter; one battery switch; one grid condenser; one grid leak; two 5 watt oscillator tubes with sockets; one blocking condenser; one oscillation choke coil; two filter condensers; one filter reactance coil; an alternating current power transformer, and two 20 watt rectifier vacuum tubes.
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.
When an alternating current flows through a coil of wire the reversals of the current set up a counter electromotive force in it which opposes, that is reacts, on the current, and the higher the frequency of the current the greater will be the reactance.
The filament terminal takes a current of 7.5 volts and this is supplied by another secondary coil of the transformer. This rectifier tube delivers a direct current of 20 watts at 350 volts. The price is $7.50. The Filter Condensers. These condensers are used in connection with the reactance coil to smooth out the pulsating direct current after it has passed through the rectifier tube.
But when the positive half of an alternating current is made to flow through a large inductance it acts like a large resistance as before and likewise smooths out the current, but none of its energy is wasted in heat and so a coil having a large inductance, which is called an inductive reactance, or just reactor for short, is used to smooth out, or filter, the alternating current after it has been changed into a pulsating direct current by the rectifier tubes.
Word Of The Day
Others Looking