MDF Metal detecting & metal detectors resource: a friendly forum to discuss all your detecting needs and promoting responsible metal detecting for all.
The 4khz can be applied to any programme,but not all of them like it,I detect nowadays on (1) Basic 1 @ 12khz with (2) Gm Power @ 4k to eliminate iron and (3)Deus Fast @ 18khz as backup on dodgy signals-this covers the vast majority of situations.