Hi LRLMAN,
unfortunately I do not know when I return to Italy as part of my life is spent here in Switzerland with my wife who is not in good health.
You speak of the Teacher Alonso, but Alonso has nothing to do with my LRL that originated from an RF sniffer that's autooscillates and acted as a LRL.
For the moment the only pcb I can show you is on the forum but you can experiment with other pcb. Even the antenna is not critical, okay a stylus antenna or a tube of copper or brass from 30 to 40cm long. L1 also is not critical, diameter of wire is about 1mm, 10 x 10mm with 3 turns it's ok, also 2 turns work well and the inductance is not important, my instrument is not very accurate.
Best Regards
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