Rectifier Tesla
2009
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Rectifier Tesla
Vacuum tube's history and development
The 19th century saw increasing research with evacuated tubes, such as the Geissler and Crookes tubes. Famous scientists who experimented with such tubes included Thomas Edison, Eugen Goldstein, Nikola Tesla, and Johann Wilhelm Hittorf among many others. With the exception of early light( 5050 SMD Flexible Strip with non-waterproof 5 Meters 150 LEDS) bulbs, such tubes were only used in scientific research or as novelties. The groundwork laid by these scientists and inventors, however, was critical to the development of subsequent vacuum tube technology.
Although thermionic emission was originally reported in 1873 by Frederick Guthrie, it was Thomas Edison's 1884 investigation that spurred future research, the phenomenon thus becoming known as the "Edison Effect." Edison patented what he found,but he did not understand the underlying physics, nor did he have an inkling of the potential value of the discovery. It wasn't until the early 20th century that the rectifying property of such a device was utilized, most notably by John Ambrose Fleming who used the diode tube to detect (demodulate) radio signals. Lee De Forest's 1906 "audion" was also developed as a radio detector, and soon led to the development of the triode tube. This was essentially the first electronic amplifier, leading to great improvements in telephony (such as the first coast-to-coast telephone line in the US) and revolutionizing the technology used in radio transmitters and receivers. The electronics revolution of the 20th century arguably began with the invention of the triode vacuum tube.recommend directory: 5050 SMD Flexible Strip with waterproof 5 Meters 300 LEDS
The English physicist John Ambrose Fleming worked as an engineering consultant for firms including Edison Telephone and the Marconi Company. In 1904, as a result of experiments conducted on Edison effect bulbs imported from the USA, he developed a device he called an "oscillation valve" (because it passes current in only one direction). The heated filament, or cathode, was capable of thermionic emission of electrons that would flow to the plate (or anode) when it was at a higher voltage. Electrons, however, could not pass in the reverse direction because the plate was not heated and thus not capable of thermionic emission of electrons. recommend directory: 5050 SMD Flexible Strip with non-waterproof 5 Meters 300 LEDS
Later known as the Fleming valve, it could be used as a rectifier of alternating current and as a radio wave detector. This greatly improved the crystal set which rectified the radio signal using an early solid-state diode based on a crystal and a so-called cat's whisker. Unlike modern semiconductors, such a diode required painstaking adjustment of the contact to the crystal in order for it to rectify. The diode tube was a reliable alternative for rectifying radio signals. Higher power diode tubes or power rectifiers found their way into power supply applications until they were eventually replaced by silicon rectifiers in the 1960s.
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Is there anything to the Tesla Free Energy technology?
I'm familiar with crystal radio sets that generate enough power without batteries to drive an earphone. I guess that's about milliwatts of power . . .
But is is possible to use inductive - capacitive circuits with a bridge rectifier and an antenna and ground to generate a small but useful electrical current?
Just curious . . .
Thanks,
Those are all good answers. If you live close to a powerful transmitter, an antenna can pick up enough energy to light a LED = light emitting diode = a few milliwatts. The transmitter owner paid for the electricity, so it is not really free. A full wave doubler circuit is better than a full wave bridge and takes two diodes instead of 4. Neil
Half-wave Tesla Coil
