Hi all the IONSHOOTERS!!!
If the decive works in conjunction of stability and sensibility with addition of bips generator, sure will be detect gold, silver, alloys of these, copper and bronze. Distance in discussion. Maybe 20 m for a coin.
Geo:
The machine was experimental for gold. The center antennna is a bronze type sharp end. A TV flayback generates high voltage and charge high voltage capacitor in order 30 pF 30 kV during few seconds. This generates an "ionic wind" and the copper disc receive and actuates as a key connected to chemical classifier, but don't have more info about it.
TLC 271 replacement FROM ANOTHER ELECTRONIC FORUM: Probably the best replacement for LF351 will be CA3140, but you can easily use TLC271, ICL7611, TLC071, TLC081.
For replacement TLC 272 you can use TLC072, TLC 082. Or commons TL062 - TL072,
LF412, LF353. More new is NE5532.
For single maybe the commons TL061, TL071,
LF411, LF351, LF356. More new is the NE5534. Try!!!
Bakelite is better. No static collected.
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Ivconic:
555 comparator-timer (great discovery!) is useful for all you think. If you connect a tuned coil, you can test oscillators, search heads, etc. If you connect phototransistor or IR led receiver or photorresistor, test remote controls, phototransistor, photodiode, etc. If you connect a coill winding in magnet, you detect vibrations. An short antenna detects flyback oscillation or pulse induction. No limits! Is my universal "revealer".
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FrancoItaly:
Respect the battery formed in earth: here the radio by earth battery by galvanic effect!!! (so consider old time buried gold and any conductive metal as battery):
