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[J SLade]

So I was able to find a fair amount of information on the correlation between FE and F2 for the EQX 800 in this thread and the dankowskidetectors.com thread that was linked but there wasn't as much for us EQX 600 owners. At least not as easy to find. However, between what I was able to find here, and the limited information provided in the latest instruction manual, I think I've finally figured it out, at least for the low to mid iron bias ranges. Here it is in table format:

The high end numbers in red are pure conjecture of what the FE equivalents would be based on extrapolating a linear trendline from the medium iron bias range. Not particularly useful numbers but I thought it was interesting for perspective.

Let me know if I missed anything.

[Flowdog]

18 hours ago, Jackpine said:

Flowdog I had pretty much the same experience hunting the nails where an old church burnt down.  Many many times I would get falsing that in my experience constituted a high probability of a non-ferrous in the iron only to be the iron tricking me.  These were not the grasping for straws that we sometimes go for, some of them I thought should have been non-ferrous.

But then, F2 0 did it's thing when I got a nice smooth fainter yet quick high tone that stopped me dead.  I spent a lot of time interrogating this one.  luckily I had initially hit it just right as it was only discernible from a narrow sweep angle.  With a tight well centered sweep It gave a repeatable TID of 17.  After removing the plug the signal disappeared and cleaning the loose soil from the bottom of the hole gave the same result.  I loosened the soil in the bottom to a depth of around 8" and started running handfuls over the coil.  Eventually I had it in my hand, It was not the IH or junk target I had surmised but a 1916 wheat penny normal TID 22-24.

Tom

Tom, good job sticking it out with that wheat cent! And thanks for describing your outing using F2. The wheat TID 17 is unsettling. It will make mandatory a return trip to the old site in my post. I recall getting TID 17 three or four times that resolved pure and steady. I passed. In the falsing cacophony of F2 on low I covered an old harmonica reed @ TID22 that was rock solid. Same TID with an old set of keys, but not from every angle. The purest tone that day was on a very old crimped bottle cap. I think it may be made of brass? Non-ferrous, heavy, and clean. Possibly copper. The point being, the lower range in F2 seems, at least to my hearing, to produce moving/falsing audio for every iron, alloyed, corroded and/or irregular shaped target. However, all that activity came to an abrupt, steady and very welcome tone on a both circular and irregular shaped non-ferrous targets amongst heavy junk. Simply the lower scale of F2 doing its job: Unmasking to the greatest extent possible.

I believe ML turned loose Tom D on the F2 project to advance the cause of tackling the unmasking physics we all suffer from. Steve H has more than once pointed to Tom's article, "The Painful Truth", showcasing Tom's current F2 passion to make masking a bit less onerous.

Meanwhile, back in the dirt, I will be digging those 17's that I walked over. Maybe wheaties or may be Indian Heads! Either way, thanks Tom for the heads up on the weird TID.

Curtis

[Jackpine]

It was fortunate that I had lowered the range of my high tone coin program from 18 down to 17 to hunt this particular site..  This was a couple days before the upgrade went on line.  

Yesterday I hunted a different site that has some rotting tin like can lids and pieces.  I dug several of these and found that the smaller pieces will actually go to the iron tone by simply moving F2 0 up to F2 2.  That was a eureka moment for me.  I also dropped recovery down from 3 to 2 and the hunt in that area was a giant step in intelligibility for me compared with F2 0 with recovery 3 and part of that was due to the reduced fatigue factor.  Cleaner more coherent sounds akin to crappy loud speakers vs Hi-Fi.

 

[GB_Amateur]

3 hours ago, Jackpine said:

It was fortunate that I had lowered the range of my high tone coin program from 18 down to 17 to hunt this particular site.

If bronze cents are coming in that low, where are Zincolns?

 

[Steve Herschbach]

Lots of things mess with target id in the ground, especially in dense ferrous.

[Flowdog]

3 hours ago, Jackpine said:

t was fortunate that I had lowered the range of my high tone coin program from 18 down to 17 to hunt this particular site..  This was a couple days before the upgrade went on line.  

If you don't mind answering a couple questions about your coin program, are you using any disc, or do you run with horseshoe engaged? How many tones also. 

 

4 hours ago, Jackpine said:

 

Yesterday I hunted a different site that has some rotting tin like can lids and pieces.  I dug several of these and found that the smaller pieces will actually go to the iron tone by simply moving F2 0 up to F2 2.  That was a eureka moment for me.  I also dropped recovery down from 3 to 2 and the hunt in that area was a giant step in intelligibility for me compared with F2 0 with recovery 3 and part of that was due to the reduced fatigue factor.  Cleaner more coherent sounds akin to crappy loud speakers vs Hi-Fi.

I was experimenting varying RS between 3 & 2 and IB from 4 down to 0. After the county sheriff arrived my concentration was shaken, even though he decided I was on my permission. I had no concentration remaining whatsoever when after the sheriff left, I had a concerned citizen honking his car horn at me. After explaining myself yet again, I was too frazzled to resume my experiment with F2. But my aborted experience with recovery 2 and low F2 coupled with your experiences, gives some clue where I'll start when my state of mind is right to go back to that particular permission or my next hunt in a different spot.

[Jackpine]

8 hours ago, Flowdog said:

If you don't mind answering a couple questions about your coin program, are you using any disc, or do you run with horseshoe engaged? How many tones also. 

I run all metal all the time.  I believe I said 3 tone but its actually 4.  Foil 1 thru 11 low tone, nickel 12 and 13 high tone.  14-16 a mid tone, 17 and up high tone.  Vol 6 on the iron

I was experimenting varying RS between 3 & 2 and IB from 4 down to 0. After the county sheriff arrived my concentration was shaken, even though he decided I was on my permission. I had no concentration remaining whatsoever when after the sheriff left, I had a concerned citizen honking his car horn at me. After explaining myself yet again, I was too frazzled to resume my experiment with F2. But my aborted experience with recovery 2 and low F2 coupled with your experiences, gives some clue where I'll start when my state of mind is right to go back to that particular permission or my next hunt in a different spot.

I'll probably change up the Bias and speed site dependent but 2 and 2 was working well for me yesterday.

Tom

[Jackpine]

4 hours ago, GB_Amateur said:

If bronze cents are coming in that low, where are Zincolns?

 

and IH's that normally hit 19-20?  add in the bouncers with negative numbers that are non-ferrous targets in hiding.  It's a jungle out there!

[cjc]

On 10/1/2019 at 1:49 PM, Flowdog said:

 running F2@9 sounded like I had cotton in my earphones. 

Well said but it's doing a remarkable job up at the high settings--killing even alloyed slag.  Looking at Steves chart didn't realize that it was an expanded range on both ends = better drawing of targets out of iron???  My intital "cap beater" F26+ range tests (In 2 tone to liven it up--take the cotton...) were impressive and seemed to offer a good solution for those brutal slag and cap infested beaches.  Much as I like to complain I open my mouth and nothing comes out...!!!