Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 22, 2025
To vary the current flowing from the A or storage battery through the filament so that it will be heated to the right degree you adjust the rheostat while you are listening in to the signals or other sounds. By carefully adjusting the rheostat you can easily find the point at which it makes the tube the most sensitive.
The required parts are the 50 watt tube; the grid leak resistance; the filament rheostat; the filament storage battery; and the magnetic modulator. It is not advisable to use an induction coil for the modulator for this set, but use, instead, either a telephone transformer, or better, a magnetic modulator of the second size which has an output of from 1-1/2 to 3-1/2 amperes.
Connect the + or positive electrode of the storage battery with one terminal of the filament of the vacuum tube, the other terminal of the filament with one post of the rheostat and the other post of this with the or negative electrode of the battery.
Connect the + or positive electrode of the storage battery with one terminal of the filament of the vacuum tube, the other terminal of the filament with one post of the rheostat and the other post of this with the or negative electrode of the battery.
At least, it had put out the fire. Fire? What fire? The fire in his body, the scalding heat that had been quenched by the cold water. Slowly, as though it were being turned on through a sluggishly turning rheostat, consciousness came back to The Guesser. He began to recognize the sensations in his body. There was a general, all-over dull ache, punctuated here and there by sharper aches.
While one of these sets costs more than you can assemble a set for yourself, still, especially in the beginning, it is a good plan to buy an assembled one for it is fitted with a panel on which the adjusting knobs of the rheostat, tuning coil and condenser are mounted and this makes it possible to operate it as soon as you get it home and without the slightest trouble on your part.
The current from the battery, B, traverses the selenium plates and the bobbins of the magnet, M, and returns to B through the rheostat, W; and the same occurs with the current from B'. The two currents, then, are absolutely independent of one another. From this description it is very easy to see how the system works.
The required parts are the 50 watt tube; the grid leak resistance; the filament rheostat; the filament storage battery; and the magnetic modulator. It is not advisable to use an induction coil for the modulator for this set, but use, instead, either a telephone transformer, or better, a magnetic modulator of the second size which has an output of from 1-1/2 to 3-1/2 amperes.
Word Of The Day
Others Looking