I just picked up Coiltek line of coils so I wanted to test the new Joey 5X10" DD coil against the Sunray X-5 coil and the stock Minelab E-Trac coil with some controlled environment air testing. We all know air testing doesn't give proper depth but it will give us an idea. What I found out was surprising.
First up the Minelab E-Trac stock Pro coil,
With screen all the way open no change in either mode.
Second 5X10" joey coil.
With screen all the way open no change in either mode.
Third Sunray X-5 coil.
With screen all the way open no change in either mode.
My conclusion is discrimination on the Minelab E-Trac doesn't really lose depth if any at all. Sensitivity however does lose depth. The Coiltek Joey coil may separate a bit better than stock Pro coil but not get the depth. If you want a trash coil use the Sunray X-5 coil. Much better separation than the Joey and close to same depth.
Anyone with questions feel free to contact me! Love to help you or make you better deals! Thanks, Bart.