I see the xtal. and the diode in the Rangertell. The use of silicon diode is wrong here. Must be used high quality low drift germanium diode or even a germanium transistor as diode. Also the Xtal. freq. MAYBE is wrong, 4.43. In the 2000 I work with different xtals. in antenna FOR ELECTRONIC LRL PISTOL. Yes, this frequency (4.43) detect the gold (OBJECT PLATTED BY GOLD), but with interruptions. Of course, I have buried gold in my patio, no pure gold, clock platted by gold BURIED MANY YEARS. But found other object, a small platted gold chain by Rommanel, bijouterie, only platted by gold jewel, not pure.
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