Put whatever stock you choose into this supplied info..
First test down the barrel of nail using clad dime. Ruler in pic to show nail size and orientation.
Nox in gold 1 passes test speeds 5-8, iron bias 0-1.
Park 2 gives trailing tone off the left.
Deus using elliptical coil fails all freq except 74khz band.
Impact using 4x7 coil passes 20khz only.
I like reporting of Nox better here than Impact though.
This just took the beginning of testing., more later.
Another pic.
Nail suspended two 2x4 thick over clad dime.
Sweeping across nail lengthwise.
Nox 800 using park 2speed 7 nails dime and IDs accurately -25 in the window.
Impact using 14khz don’t like, using 20khz hits but a user has no clue to targets conductivity level.
Deus hits using elliptical Hf coil, no ID at all until I lowered reactivty to 2, and ID here not accurate.
Another test.
Nail suspected above clad dime sweeping down nail longways to detect dime. Notice just one 2x4 thickness high for the nail.
Nox using gold 1 jumps on this dime using speed 7 iron bias 0.
I should mention sweeping all nails previously solo with Nox, even at iron bias 0 quiet.
Park 2 speed 7 hits the dime too not as well (more coil sweep speed sensitive vs gold 1 mode.
Both modes yielded 17 in the meter.
Impact only chirps on the dime, in a site with a lot of iron, a user just might walk right by.
Deus using 14.4khzwas tied up in knots. Fail.
Using 28.8khz is a pass. Better use no reactivty lower than 2.5 though or you might miss.
Deus tests was disc at 6.2 pitch tones.
All detectors ground balanced to concrete sterile steps.
No trick boys and girls.
I just report what I see.
Anyone needed more info a far as setting used any detector feel free to ask and i’ll Try an answer.
Btw my Nox 800 unit, a full factory reset done as soon as coil was on.
So so far I have have done is played with speed and iron bias setting.
Another test with pic.
That’s a big nail suspended 2 boars thickness high.
Sweeping down nail lengthways to detect nickel.
In configuration shown both gold 1and Park 2speed 5-7 gives good 2 way hit signal, 5is the shakiest though of the bunch.
Amazing how hast I can swing and hit the nickel.
Impact hit using 20khz, tone not as pure sounding as Nox though.
Deus hits using both 14.4 kHz and 28.8 kHz, gotta watch how low you set reactivty using lowest freq band.
Disc of 6.4used on Deus pitch tones, had to raid disc due to size of nail.
Some air test data.
Measured from top of coil.
Park 2 outside with single phase power lines nearby overhead. Noise cancel done.
Speed 7 iron bias 0
Clad dime approx 9”
Us nickel approx 11.5”
Speed 5 iron bias 0
Clad dime approx 10”
Us nickel approx 12”
Smaller coils performance on steel bottlecaps seems to be very similar to stock coil.