looking for a circuit that has Pinpoint mode for ground balancing.

[kt315]

but in discrimination mode the penetration drops drastically to 10 cm.

because on non-ferrous metal at first a reaction is an increase only in a signal phase, but not in an amplitude (later the phase and amplitude grow up). mean RX. on ferrous metal there is an increase in both the phase and the amplitude just right in RX coil. but the DISC circuit... built that both increases are needed for comparators work. then you waste the depth.
because you do not research the primary just-phase reaction on non-ferrous.
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[Carl-NC]

On the IDX scheme I switch to "all metals" mode, the ceramic detects it as metal, and the ferrite detects it as metal.

Something is wrong with the circuit, AM mode should be able to balance those out.

[kt315]

yes, do not keep ceramic, ferrite in your hand moving to coil. you have to glue them on flat wood batten hands out. do your experiment cleaner.

[algan]

If I apply one pulse with the amplitude to the comparator, which is GB, and the second pulse, which is for DISC, is 180 degrees ahead of the comparator, what will happen? If anyone has tested it, please tell me.