Ionospheric antenna get 5 KW free !

[triffid]

I got a guy here at work to look at it for me.Wish me the best.Triffid

[triffid]

I'm having a little luck in getting three pages of spanish text translated.I hope its the construction of the receiver.Its supposed to be done by this sunday.by a guy at work who knows electronics,english and spanish.He translated two paragraphs for me so far and I was delighted with the results(he had done a good job).triffid

[triffid]

here it is Jan 20th,2008.The guy at work here says hes translated one page out of three.So maybe progress is slow.At least I am having some luck with this project.Triffid

[triffid]

feb 5th and the translator has been too busy with his personal stuff to translate any more than the one page he's already done.Says he 'll get it done this weekend...we see I guess.triffid

[daveyboywonder]

I had to re type the text from pdf cause the fonts were foreign to my computer, then usedtranslation software-- many errors-- good luck!..  The purpose of this I articulate it is the dieinar and to build a receiver for waves of very low frequency in order to recepcionar the waves Schumann of resonance ionosferica and to appreciate their dynamic behavior so much in the time as reception places, and to show experimental achieved practical results.                     The resonant cavity or guide of wave Earth / Ionosfera was predicha and described mathematically in 1952 by German W. O. Schumann and he/she made experimental publications on the topic for 1954, these resonances are manifested as peaks of the noise of bottom of the electromagnetic terrestrial spectrum, it is easy to measure their first 4 ways which happen approximately to: 7.8 Hz, 14 Hz, 20 Hz, and 26 Hz, being the fundamental of these frequencies that of more width and since interest the other ones decays in intensity. The levels of width of these resonances are of the range of the microvolt for the component of electric field, and of the pick Tesla for the magnetic component of the wave.                                  The first thing is the election of the antenna to use, it is I practice and economic to think of an antenna type whip of about 2 mts of long for the receiver in order to induce in the same one some micro-volts of serial, and it is however the one that will use to design the receiver, the ideal thing serious to be able to design an antenna to capture the magnetic component of the serial one, because this antenna type is immune to other interferancias, easy to gauge, however they are very difficult of designing, a great patience is required and but expenses, because it is about an antenacon form of reel of many wire turns, because it is achieved this way the wanted detection and amplification of serial via the well-known relationship: V = wANB, being TO the section of Reel, N the I number of total turns, and B the component magnetic of serial VLF to measure, besides being used a nucleus of high permeability to achieve but amplification.                            The following figure shows an antenna VLF of the type reel referred previously:                                                                        It consists of 4 windings in series, of which two points are in the same address, each winding has a diameter of 10,3 cm and it consists of 309 turns each one, but like he/she said, this is optional and ideal, but for not getting complicated so much, we can, while, to design an antenna for our receiver that is one of type whip to capture alone the component of electric field of the wave and not magnetic, in spite of the annoyances.                                 As optamo for the simple thing, an antenna type whip of about 2 mts of long, we should know what passes with the serial one, and what makes this antenna type to the same one, clearly is an antenna outside of syntony or not resonant, because the long physique of the same one is much smaller that the ondra longitude for the fundamental of 7,8 Hz (9400 Km!!), for this case, the antenna behaves as if was a condenser, and the serial one induced in the same one for the case of the 7,8 Hz it is in the range of 1 microVolt to the 10 microVolt.                                    This way then, the tension induced in the antenna quenda in series with the capacity of the same antenna defining the impedance of necessary entrance to design for the receiver and the capacity of entrance of the same one.                           These antennas of type whip have a theoretical capacity of about 10 pF / mt that to the 7,8 Hz to recepcionar gives us an impedance of entrance of 900 Mega Ohms! That which tells us that our receiver to design should have an impedance of high entrance.                                     This can solve it using a circuit that uses transistors type FET of high impedance like sample:                               Fig. 2 circuit receiving waves Schumann.                     It is about an originator follower whose main characteristic is its great entrance impedance that in general surpasses the hundred of Jig Ohms and with a low capacity parasita of about 10 pF approximately. If the marked condenser as C not this present, the answer in frequency of this receiver is flat among 1 Hz until the dozens of MHz, very low noise, excellent linearity and dynamic great range.      The couple of transistors 2N3904 simulate a resister of high imedancia, about 500 given Jig Ohm their characteristic V/I.                        The construction of this receiver should follow certain basic rules in order to make good mensurations:                                 -Use a metallic blindage for the circuit.                     -To weld the floodgate directly from JFET to the entrance connector.            -Use a connector of entrance type BNC or SO-239 that offer good isolation      -Avoid to play the entrance connector or the base of the entrance of JFET this would dirty the contacts and it would lower the entrance impedance, clean with distilled water and pure alcohal.                                       The syntony is simple, to land the entrance and move the potenciometro until in the exit they are had zero Volts, when putting the antenna in the exit hundred of mili Volts they will be had.                                       The following step, and the but problematic, it is the seperacion of the electric noise that surrounds us of the sign that we want to measure, this noise it can be natural or artificial created by the man, the one that can ascend to 60 dB or but, regarding the serial one to measure. Some of these sources of not wanted noise are: Local radios of AM, military transmitters VLF, atmospheric potent discharges and the coming from you line them of electric transmission.                                    Using a capacity for C of about 270 nano Farads, it is possible to reduce enough the noise in the high range of frequency, or I filter it passes first floor, or, taking out it and using an anilizador of spectrum type FFT, even so they continue bothering noises, especially, that of the 50 Hz or 60 Hz of you line them electric surrounding, according to the country where we are, it is useful to use good filters, as NOTCH to eliminate, especially the noise of you line them electric of power.                  After the filter to use, some amplification type should be used, if was necessary, to process the exit sign, either spectrum or dynamic range and to compensate the attenuation of the filter for the noise of it lines electric, a normal value could be a gain of 100.                                 Maybe the noise in the particular location where the reader is it is not totally atenuable, reason why he should choose some town but far away.         Finally, the prosecution of the ideal sign is via applying a FFT (Fast Fourier transform) that allows to visualize the spectrum of width of the sign, an ideal serious option to be able to have an oscilloscope with this function FFT, and in the event of not being this way, you can use a card of sound of any PC and to lower gratuitous software for this end, although the quality of the sampling non serious maxim.                  Choose, always, for a good mensuration a place him but distant possible of you line them of electric transmission and big near objects as you hoist, buildings, etc that you/they introduce a divider of tension with the antenna capacity and they reduce the width of the sign, neither make mensurations with bad climate, due to the signs often induced by the wind, pulses of load of the drops of Iluvia, and the not well upset field terrestrial electico, and always land the carcaza of the receiver.                     The following spectrum was obtained by a collaborator that I use a filter NOTCH (of 25 mensurations using a time of integration of 40 seconds:               They are appreciated the resonances clearly Schumann in realtime.            The receiver is fundamental to establish the frequency of the transmitter VLF that permtiria to lower gratuitous energy from the ionosfera.                     Juan Araya M