United States or Paraguay ? Vote for the TOP Country of the Week !
The easiest way to get a clear conception of how a wireless transmitter sends out electric waves and how a wireless receptor receives them is to take each one separately and follow: in the case of the transmitter, the transformation of the low voltage direct, or alternating current into high potential alternating currents; then find out how these charge the condenser, how this is discharged by the spark gap and sets up high-frequency currents in the oscillation circuits; then in the case of the receptor, to follow the high frequency currents that are set up in the aerial wire and learn how they are transformed into oscillations of lower potential when they have a larger current strength, how these are converted into intermittent direct currents by the detector and which then flow into and operate the telephone receiver.
He was experimenting with high-frequency electric currents, investigating the nature of the discharges used for electrifying certain things. Quite by accident he found that when the room on which he was experimenting was occupied by some person his measuring- instruments indicated that fact.
In a few months I was gratified to find my doubts confirmed. A short time after this I made a more unexpected and astonishing discovery. I found that this complex and hitherto misunderstood gas could, under the influence of certain high-frequency electrical discharges, be made to combine with explosive violence with the nitrogen of the atmosphere, leaving only a harmless residue.
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.
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.
Something about high-frequency waves stimulating certain brain and nerve centers. What if one were shielded from those rays? That tear in the side he himself must have climbed through that the night they crashed. And the break was not too far from the space lock. Near the lock was a storage compartment. And if it had not been jammed, or its contents crushed, they might have something.
It consists of a thin platinum wire through which the high-frequency currents surge and these heat it; the expansion and contraction of the wire moves a needle over a scale marked off into fractions of an ampere.
This did not prevent him from asking me about the details of my examination work, in which I was still engaged at that time; he always gave himself fully to whatever claimed his attention at the moment. I told him of my experimental researches in electrical high-frequency phenomena, briefly introducing the particular problem with which I was occupied.
The resistance of a circuit to high-frequency currents is different from that for low voltage direct or alternating currents, as the former do not sink into the conductor to nearly so great an extent; in fact, they stick practically to the surface of it, and hence their flow is opposed to a very much greater extent.
As the weeks and months wore away, and as the season of violent and high-frequency alternations between summer and winter, which the Chicagoan calls spring, gave place to summer itself, Rose was driven to intrench herself more and more deeply behind this great expectation. It was like a dam holding back waters that otherwise would have rushed down upon her and swept her away.
Word Of The Day