is not easy build one lrl, because all the lrl work in one excesive critic point of equilibrio adjust and stabilization, too the frecuences is one beat of dual or four frecuences to same function
exist simple lrl to build, but these how zahory are very senses to distant or near emission of energies too lrl need be whit discrimination because the lrl detect all stuff of iron or mineralizations in the field
only experiment in large time each one, proff acierto and error" is possible obtain personally one own lrl detector
so lrl is not obtain in public sales, so these need ocasional maintenance
dman.
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