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Updated: May 1, 2025
For this transmitter you require: one oscillation transformer; one hot-wire ammeter; one aerial series condenser; one grid leak resistance; one chopper; one key circuit choke coil; one 5 watt vacuum tube oscillator; one 6 volt storage battery; one battery rheostat; one battery voltmeter; one blocking condenser; one power circuit choke coil, and one motor-generator. The Oscillation Transformer.
You can, however, use 110 volt direct current from a lighting circuit as your initial source of power to energize the plate of the vacuum tube oscillator of your experimental transmitter. Where you have a 110 volt direct current lighting service in your home and you want a higher voltage for your plate, you will then have to use a motor-generator set and this costs money.
This is made exactly like the one described in connection with the experimental transmitter. The Motor-Generator Set. Where you have only a 110 or a 220 volt direct current available as a source of power you need a motor-generator to change it to 350 volts, and this is an expensive piece of apparatus.
It was a fifty-horse motor-generator, on a five-ton tungsten-beryllium base, but it rose abruptly, spun rapidly about an axis at right angles to the axis of its armature, and stopped as suddenly. In mid air it continued its interrupted lecture. "Mercury therefore is the destination I would advise. There power is sufficient for all machines."
Screw in a pair of 5 ampere fuse plugs, close the switch and you are ready to tune the transmitter and talk to your friends. A 25 to 50 Mile Wireless Telephone Transmitter With Direct Current Motor Generator. Where you have to start with 110 or 220 volt direct current and you want to transmit to a distance of 25 miles or more you will have to install a motor-generator. The Apparatus You Need.
This is made to take care of a 10 volt current and it costs $10.00. The Filament Storage Battery. This must develop 12 volts and one having an output of 40 ampere-hours costs about $25.00. The Protective Condenser. This condenser has a capacitance of 1 mfd. and costs $2.00. The Motor-Generator.
It consists of a single armature core with a motor winding and a generator winding on it and each of these has its own commutator. Where the low voltage current flows into one of the windings it drives its as a motor and this in turn generates the higher voltage current in the other winding. Get a 100 watt 350 volt motor-generator; it is shown at F and costs about $75.00. The Panel Cut-Out.
The chief difference between a wireless telephone transmitting set that uses an alternating current and one that uses a direct current is that: a power transformer is used for stepping up the voltage instead of a motor-generator, and a vacuum tube rectifier must be used to convert the alternating current into direct current. The Apparatus You Need.
And then there was the smell of burned insulation and a wire was arcing somewhere, while thick rubbery smoke arose. A fuse blew out with a thunderous report, and Tommy Reames leaped to the suddenly racing motor-generator. The motor died amid gasps and rumblings. And Tommy Reames looked anxiously at the Fifth-Dimension Tube. It was important, that Tube.
This is made exactly like the one described in connection with the experimental transmitter. The Motor-Generator Set. Where you have only a 110 or a 220 volt direct current available as a source of power you need a motor-generator to change it to 350 volts, and this is an expensive piece of apparatus.
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