Lrl from Italy

[Dubulumach]

Originally Posted by FrancoItaly

As I have already said I do not have much experience in research so I do not know if you can evaluate the depth of the buried metal. The fact that the signal disappears on the vertical of the target is normal. I have never experienced a disturbance of the ground but rather a sky effect, ie the appearance of a signal by lowering or raising the lrl. However this effect is connected to the compass effect and disappear together by lowering the gain. As for the coil stimulator my first functioning lrl in practice it was a PI, a 60Khz pulse oscillator excited a resonant coil at about 5Mhz, the receiving coil, arranged perpendicularly to reduce the signal. The signal of the receiving coil and that of the antenna (V-shaped) were mixed in a toroidal transformer and sent to amplifier and sampler stages. The transmitter coil was the same as the oscillator at 8Mhz in my last lrl but according to me it was not useful for operation, or at least it is more complicated to realize and to fine-tune. We can say that the first exemplar of lrl built by Alonzo was a commercial metal detector modified with the addition of a ferrite coil, which was the receiving antenna. In my opinion, all lrls are of a passive type and no signal is transmitted, there may be some kind of filter to highlight gold but I have doubts about their effectiveness.

Yes i think exactly on that continuous appearance of a signal by lowering to the ground or raising to the sky the lrl stylus-whip antenna as you called it sky effect. Overal lrl gain should be lowered enough, to avoid this unpleasant sky effect. I also have very strong signal with your quartz lrl - (all 3 lrl's led diodes fully lit), something about 40 meter in distance to nearest earthed roman tombs, while in previous prospecting area, several days before over the earthed tombs, magnetometer power supply unit has burnt from the phenomenon force rising from underground.

Thank you very much FrancoITALY on valuable informations.
Seems to me that you are the BEST MAN HERE AT THIS FORUM. GOOD LUCK, BEST WISHES.

Dubulumach