GERMANIUM DIODE AND FARADAY CAGE.
Konstatin Raudive created a new method of getting better quality evps. He had an amazing career in evp research and this was one of his innovations to the science. He found during experimentation that using a germanium diode plugged into his recorder rather than a microphone got him higher quality voices on his recorders. With the diode method we could all be sitting in the room having conversation during recordings and our voices let alone any background noise could not be picked up. Thus said though, radio waves could still interfere with this technique. That's where the faraday cage is employed in conjunction to eliminate this possible interference. You put your recorder in a faraday cage and this assures that outside interference from radio waves and electromagnetic frequency's is not possible. A cheap and sufficient way of obtaining a faraday cage is using a microwave because it is designed not to allow microwaves to escape. To test the microwave, first make sure it is not plugged in, then put your cell phone in it and call it from a land line phone. If the call does not go threw, then you have yourself a legit faraday cage for home evp research. It is cheap to make a germanium diode, just go to your local radio shack and ask them for a packet of 1N914 germanium diodes which will cost you a $1.50 for 50 diodes. Now get yourself a male jack that will fit your recorders microphone input. Purchase some speaker wire and you got what you need. This is were my good friend Todd came in handy. Solder the diode to one end of the wire and the male jack at the other end. Now you have a new means of obtaining full proof evps. I'll be honest with you, I've logged about three hours of this technique and have gotten nothing. I will continue with this technique and hope for some evps in the future. Good luck and happy hunting to all. NNYPG1.
DIODES & FARADAY CAGE DEFINITIONS AT WIKIPEDIA
In electronics, a diode is a device possessing two (and only two) electrodes (except that thermionic diodes may also have one or two ancillary terminals for a heater). Diodes have two active electrodes between which the signal of interest may flow, and most are used for their unidirectional current property. The varicapdiode is used as an electrically adjustable capacitor.
The directionality of current flow most diodes possess is sometimes generically called the rectifyingproperty. The most common function of a diode is to allow an electric current to flow in one direction (called the forward biased condition) and to block it in the opposite direction (the reverse biased condition). Thus, the diode can be thought of as an electronic version of a check valve. Real diodes do not display such a perfect on-off directionality but have a more complex non-linear electrical characteristic, which depend on the particular type of diode technology. Diodes also have many other functions in which they are not designed to operate in this on-off manner.
History Although the crystal diode was popularized before the thermionic diode, thermionic and solid state diodes developed in parallel. The principle of operation ofthermionic diodes was discovered by Frederick Guthrie in 1873.The principle of operation of crystal diodes was discovered in 1874 by the German scientist, Karl Ferdinand Braun.
Thermionic diode principles were rediscovered by Thomas Edison on February 13, 1880 and he was awarded a patent in 1883 (U.S. Patent 307,031 ), but developed the idea no further. Braun patented the crystal rectifier in 1899 . Braun’s discovery was further developed by Jagdish Chandra Bose into a useful device for radio detection.
The first radio receiver using a crystal diode was built around 1900 by Greenleaf Whittier Pickard. The first thermionic diode was patented in Britain by John Ambrose Fleming (scientific adviser to the Marconi Company and former Edison employee) on November 16, 1904 (U.S. Patent 803,684 in November 1905). Pickard received a patent for a silicon crystal detector on November 20, 1906 (U.S. Patent 836,531 ).
At the time of their invention, such devices were known as rectifiers. In 1919William Henry Eccles coined the term diode from Greek roots; di means ‘two’, and ode (from odos) means ‘path’.
A Faraday cage or Faraday shield is an enclosure formed by conducting material, or by a mesh of such material. Such an enclosure blocks out external static electrical fields. Faraday cages are named after physicist Michael Faraday, who built one in 1836.
An external static electrical field will cause the electrical charges within the conducting material to redistribute themselves so as to cancel the field's effects in the cage's interior. This effect is used, for example, to protect electronic equipment fromlightningstrikes and other electrostatic discharges.
To a large degree, Faraday cages also shield the interior from external electromagnetic radiationif the conductor is thick enough and any holes are significantly smaller than the radiation's wavelength. For example, certain test procedures of electronic components or systems that require an environment devoid of electromagnetic interference may be conducted within a so-called screen room. These screen rooms are essentially labs or work areas that are completely enclosed by one or more layers of fine metal mesh or perforated sheet metal. The metal layers are connected to earth ground to dissipate any electric currents generated from the external electromagnetic fields, and thus block a large amount of the electromagnetic interference. This application of Faraday cages is explained under electromagnetic shielding.
In 1836 Michael Faraday observed that the charge on a charged conductor resided only on its exterior and had no influence on anything enclosed within it. To demonstrate this fact he built a room coated with metal foil and allowed high-voltage discharges from an electrostatic generator to strike the outside of the room. He used an electroscopeto show that there was no electric charge present on the inside of the room's walls.
The same effect was predicted earlier by Francesco Beccaria(1716–1781) at the University of Turin, a student of Benjamin Franklin, who stated that "all electricity goes up to the free surface of the bodies without diffusing in their interior substance." Later, the Belgian physicist Louis Melsens (1814–1886) applied the principle to lightning conductors. Another researcher of this concept was Gauss (Gaussian surfaces).