Depth Meter Testing With 6” Coil

[Guest Tnsharpshooter]

What about depth meter using 6”coil?

I used 2x4s stacked to get my results here.
A pic to give idea of my setup.

Keep in mind this data based on what is displayed while sweeping in detect mode noted, NOT actual pinpoint[/B]
These are airtested results, in ground results, lots of variables can affect.
Park 2 speed 5, sens at 20
No 2x4 present and dime swept close- one triangle under shovel in meter
Add one 2x4 (btw a shade of 1.5”thickness)- 2 triangles under shovel
Add another (2 total) - 3 triangles under shovel in meter
Add another (3 total) - 4 triangles under shovel in meter

New test coming and will change sensitivity  to 24, leaving all other settings the same.
Sens 24 used
No board present and dime swept close- one triangle present
Add one board- 2 triangles present.
Add another board ( 2 total)- 3 triangles presnet
Add a another (3 total)-4triangles present
Add another (4total) - 5 triangles present under shovel

Will go back to sensitivty level 20 and  change speed to 7 next.

Sens level 20,speed 7,park 2
No board dime swept close-one triangle
Add one board- 2triangles present
Add another (2 total) - 3 triangles present
Add another (3 total) - 4 triangles present
Add another (4 total) - I get occasional 31 id, no depth info (no triangles) at all, I can hear weak signal too.

Next test US quarter, park 2, sens 20,speed 5
No board present quarter swept close- one triangle presnet 
Add one board- one triangle present
Add another board (2 total)- two triangles present
Add another board(3 total) -three triangles present
Add another (4 total)- four triagles present

Next test quarter, park 2, sens 24, speed 5
No board presnet quarter swept close- one triangles under shovel
Add one board- one triangle present
Add another ( 2 total) - two triangles present
Add another (3 total) - three triangles present
Add another (4 total) -four triangles present

For gee whiz, next test park 2 sens 13 speed 5,quarter
No board present quarter swept close - one triangle displayed
Add one board- two triangles displayed
Add another board (2 total) - two triangles displayed
Add another board (3 total) - three triangles present
Add another board ( 4 total) - no ID, no triangles, whimper of a tone heard

Next test quarter on edge, remember it may not be perfectly on edge, and I’ll use two boards to hold center maybe.
Park 2 sens 24, speed 5
Here is pic.  Boards slid together before testing to hold quarter.

Follow along here now and pay attention, since i am using boards to secure quarter.

With the 2 boards above slid together and quarter swept -two triangles present
Add one board (on top of pic above) - two triangles present
Add one board ( 2 total boards on top of pic above) - four triangles present
Add one board (total of 3 boards on top of pic above - five triangles present, signal weaker too

Next test is clad dime on edge, park 2, speed 5, sens 24

Alright with boards slid together in above pic (remember dime not very tall, so some clearance exist with setup in pick ablce when swept with coil.
Sweeping pic above - two triangles noted
Add one board (to pic above) - three triangles noted
Add one board (total of 2 added to pic) - four triangles noted
Add one board (total of 3 addded to pic) - five triangles noted pretty good ID too

Next depth meter test.
Park 2,sens 24, speed 5
US half dollar. (1936 Silver)

Coil face up swept close no boards present- one triangle in display
Add one board - two triangles present
Add another board (total of 2) - three triangles present
Add another board (total of 3) - three triangles present
Add another board (total of 4) - five triangles present with broken tone, i repeated this particular test mulitple times, same result

Next test, park 2,sens 24,speed 5, US silver dollar (1889) -Silver

No boards and swept real close BEWARE, gives clunky sound with single digit ID, with approx coil clearance of .5 inch -one triangle present and good tone and ID
Add one board - one triangle present
Add another board (2 total) - two triangles present
Add another board (3 total) - three triangles present
Add another bosrd (4 boards total) - three triangles present
Add another board (5 boards total) - five triangles present

[Andy2640]

So the very last test was at 10 inch depth and you got a good tone and ID?  That aint bad going!

Might try my sensitivity at 24 for extra depth on my next hunt.  

Kudos for some exhaustive testing there budski.

 

Andy.

[Chase Goldman]

14 minutes ago, Andy2640 said:

Might try my sensitivity at 24 for extra depth on my next hunt.  

Normally, I would not recommend this because it usually just ends up amplifying noise as well resulting no improvement or even degraded depth performance.  But the 6" coil seems more EMI and noise immune based on all these tests, so it seems like a good way to compensate for the reduced small coil depth.

Thanks for all the detailed 6" coil testing, folks.

[GB_Amateur]

26 minutes ago, Andy2640 said:

So the very last test was at 10 inch depth...?

Closer to 7.5 inches -- 2x4 ain't what it used to be....?

[Guest Tnsharpshooter]

Thanks for the replies.

Depth meter using 6”coil definitely could be useful.

Especially if searching for recently lost ring.

Notice depth info with lower sensitivty seems to remain intact, just the deeper is dropped out of meter indication wise.  Some folks may have been thinking if one reduces sensitivity, the whole range of depth might be stretched out some.  Meaning mid depths would be reflected deeper vs running a higher sensitivty.