early air test compare equinox 6 inch to 11 inch coil

[pulltabfelix]

Here is my air test on the Equinox 800 comparing the 11 inch stock coil to the 6” coil.
Did a factory reset and set sensitivity to 21, recovery speed to 6. Iron bias of 6.
Setup and methods: I set the coils on an all plastic child’s picnic table to eliminate any metal. Swept the table to determine there were no metal objects in the table.
Use a yard stick butted up against the base of the coil. My depth measurements were taken when the TID numbers for each metal object started going from a strong signal to an iffy signal. My hand sweep was done to replicate the normal sweep of a coil passing from left to right and back over the metal object.
I am a relic hunter mainly interested in Civil War items and only had three three ringers to test along with some silver coins. The results below are only for the .57 caliber. Not much difference in the slightly smaller calibers.
Below are just some preliminary tests and not the whole combinations of different items on all different hunting modes.
6” coil
.57 caliber bullet at 4 inches rang up a 19 in the park1 mode.
.57 caliber bullet at 5.5 inches rang up 16-19 in the park2 mode.
.57 caliber bullet at 6.5 inches rang up 16 in the gold2 mode.

11” coil
.57 caliber bullet at 8 inches rang up a 16 in the park2 mode.
.57 caliber bullet at 10 inches rang up 16 in the gold2 mode.

6” coil
Standing liberty quarter 4.5 inches rang up 29 in park2 mode.
Barber dime 3 inches rang up 21-22 in park1 mode
Barber dime 6 inches rang up 22 in park2 mode

11” coil
Standing liberty quarter 10 inches rang up 25 in gold2 mode.
Barber dime 7 inches rang up 21-22 in park2 mode.
Barber dime 8.5 inches rang up 21 in gold2 mode.

 

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[Hawks88]

Thanks for all that info Felix. Much appreciated.

 

[Professor of Engineering]

Thank you for sharing!

 

[dirtlooter]

this should answer a few questions, thanks. looks a depth drop or loss so far at this point unless someone figures out something better. kind of the old saying of for every gain there is a loss. still may be perfect for some applications, even relic but a lot of relics tend to be fairly deep (at least I think so). still may clean up in those shallower depths, time will tell more

 

[pulltabfelix]

keep in mind I really did not try to fine tune it with different settings. I am confident an experienced detectorist can adjust the settings and make it more effective than my air tests show.

 

[vferrari]

I is true you will get a depth loss, though. So the results are not that surprising. You did try to cover a spectrum of settings by the various combinations and that is great. The result I find most curious is hitting the barber dime DEEPER than the standing liberty quarter, but that probably goes to the fact that you were using Park 2 which will tend to hit harder on the smaller coin profile because of the higher weighted frequency.

 

[timmysys]

Thank you the test Felix! It's very useful information!