Hi Dubulumach,
You propose many changes and I think it's better to open a new thread. I think the only advice I can give you is to put the changes into practice. I can tell you the tests I did in the past and then I discarded. I used the CA3130 for the input stage in a low frequency and very high impedance version, but it proved to be extremely sensitive to walls, trees and the ground itself, therefore practically unusable and this excludes the possibility in some way to use the measurement of ions to reveal the "phenomenon". Furthermore, the first working lrl I made was in practice a pulse induction MD with a transmitting coil (about 10cm diameter), a receiving coil (a single turn) perpendicular to the transmitting coil and an input stage formed by a toroidal ferrite with three windings, one connected to the antenna (V-shaped), one connected to the receiving coil and one connected to the input stage. The three windings were tuned to the operating frequency of the transmitter coil (which was not damped as in the usual MDs). The oscillation frequency of the MD was 60Khz but that at the ends of the transmitter coil were not damped oscillations of about 5Mhz. In this type of lrl I can exclude that there was somehow the frequency of about 100Mhz as in my last lrl.
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