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Updated: May 22, 2025
Connect one end of the filament with the + or positive electrode of the storage battery, the or negative electrode of this with one post of the rheostat and the other post of the latter with the other end of the filament; then connect clip 3 with the + or positive side of the storage battery.
The small size is fitted with a pair of terminals while the larger size is provided with taps so that the voltage required by the plate can be adjusted as the proper operation of the tube requires careful regulation of the plate voltage. A dry cell battery for a plate circuit is shown at B. The Filament Rheostat.
Connecting the oscillator tubes up in parallel means that the two filaments are connected across the leads of the storage battery, the two grids on the same lead that goes to the aerial and the two plates on the same lead that goes to the positive pole of the generator. Where two or more oscillator tubes are used only one storage battery is needed, but each filament must have its own rheostat.
He sensed his Planeteers beside him as the figures loomed ahead. He gave a final spring that sent him through space with knees bent and outthrust, his hands reaching. His knees connected solidly with the Connie's thighs, and his hands groped around the bulky space suit. He felt a rheostat control and twisted savagely, then groped for the distinctive star-shaped button of the air supply.
A storage battery is used to heat the filament of the tube, just as it is with a detector tube, and it can be of any make or capacity as long as it will develop 6 volts. The cheapest 6 volt storage battery on the market has a 20 to 40 ampere-hour capacity and sells for $13.00. The Battery Rheostat. As with the receptors a rheostat is needed to regulate the current that heats the filament.
Several of these distinguished gentlemen had never seen a wireless apparatus before, and showed some excitement as Hood made ready to send the most famous message ever transmitted through the ether. At last he threw over his rheostat and the hum of the rotary spark rose into its staccato song. Hood sent out a few V's and then began calling: "PAX PAX PAX."
He placed a small rheostat in the circuit so that the strength of the current might be regulated. Slowly he moved the little handle over the graduated dial. A minute passed during which, so far as Ned could see, nothing happened. Without warning the green crystal suddenly glowed brightly for a fraction of a second, then could not be seen at all.
Connecting the oscillator tubes up in parallel means that the two filaments are connected across the leads of the storage battery, the two grids on the same lead that goes to the aerial and the two plates on the same lead that goes to the positive pole of the generator. Where two or more oscillator tubes are used only one storage battery is needed, but each filament must have its own rheostat.
Then set the variable condenser in front of it, set the vacuum tube detector at the right hand end of the tuning coil and the rheostat in front of the detector. Connecting Up the Parts.
To the left of this coil was a large relay switch, and a rheostat control. "Turn on the relay, Dad, then slowly rotate the controller to the left. And remember that it is rather powerful; I know this doesn't look like a solar engine, and nine o'clock at night seems a peculiar hour to demonstrate such a thing, but I'll guarantee results probably more than you expect." Dr.
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