Minelab Concentric coil EMI test. Minelab GPX aftermarket search coil EMI interference test.
This search coil design was discontinued and replaced by a new model with added performance and approximately 10% depth increase.
In this video: Test for electric interference (EMI) rejection with the Nexus 21" and 30" concentric Carbon Fibre search coils on Minelab GPX4500 with a 50 Cent Australia coin.
https://www.nexusdetectors.com/afterm...