On my mind -- Random Thoughts

It woold be nice if some people would stop publishing links to their YouTube channels.

midalake Wrote:
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> On my mind -- Random Thoughts
>
> It woold be nice if some people would stop publish
> ing links to their YouTube channels.

. . Why . . . does that bother you? . . . . I'm all for it if I can learn some tidbits of detecting knowledge.

Lees point about newer detectors .... is in my opinion one of the huge improvements. Every since the Etrac more machines have required less of a learning curve and are very effective out of the box. We really had a learning cure with some of the older machines..... IE DFX and Explorer. One of the hardest things for many to learn to do is slow down and listen for the weaker targets. We tend to move fast and hear LOUDER targets which can lead to the complaints of ..... we dont get a lot of depth while others do.

The machines sees and hears a lot...... disc is just turning off what you hear at the headphones. Its been great that more machine have faster processors and recovery..... makes working in trash much easier especially with the larger standard coils now days.

Little video I did.
Talks about possibility of purposely allowing detector to be purposely set to lower standard and give audio.


[m.youtube.com]

David..........That’s exactly what Ferrous Limits: Upper does!

Throughout the Decades....... regardless of brand/unit........due to physics.,.,.,.,.,., over 90% of iron nails....,,,,,,,...... will high-tone false: right at (or just slightly below) the Zinc Penny range. (Right dead in the middle of Indian Head Penny conductivity).

Hmm...

I'm trying to make sense of this, based on my experiences.

Hmm..

Is this true of SMF units? This is not a statement I would have made just based on my own personal observations. But, I note that my bias is about 98% of my hunt time over the past dozen years has been running SMF (Minelab) units...

The problems I have with nails -- mainly deep square nails -- are NOT that they attempt to masquerade as a deep IHP, but as a deep silver coin. In fact, I'm trying to think of a case where I have hit a deep target, and determined "likely IHP" in my mind, pre-dig, and then find nothing but a square nail in the hole...

Hmm...

Can you elaborate?

Steve

Steve......... absolutely! (Because I was very short on time...when I made the post last night).

* Rusty and/or bent nails .......... (even higher propensity for square nails)......... that present a fairly strong detection signal.........in low/no mineralization dirt.,.,.,.,.,.,.,.,.,.,.,.,., will present a Indian Head Penny high-tone false. (((Mid-to-high 50's ID on Manticore))).
* FRINGE DEPTH rusty and/or bent nails .......... will 'ID bounce' from Indian Head Penny conductivity........ all the way up to Silver Half Dollar......... in low/no mineralization dirt.
* Rusty and/or bent nails .......... that present a fairly strong detection signal (nails that are not that deep).... in BAD MINERALIZATION.......... can/will emulate a silver coin (Silver Dime, Silver Quarter, Silver Half Dollar) false ID.
* FRINGE DEPTH rusty and/or bent nails in bad mineralization........ have a very strong propensity to false-ID as Silver Half Dollar or Silver Dollar.

NASA-Tom,

AHH. This is VERY interesting. So, what I conclude is that based on my experience that rusty/bent or square nails, generally deep ones, will "false" as a silver coin, are falsing as "high tone" vs. "Indian-Head-Penny-range" tone, because I'm detecting in at least moderately mineralized dirt...

THAT makes sense...

Thanks!

Steve

True/Correct!

For a design engineer to be innovative ........ it is vital to know what you are MISSING......,,,,,,,in the ground.

There are WAY TOO MANY variables to set rules. Sometimes you have to dig large unknown targets which are masking good targets. If there are square nails it also could hold very old coins/relics. Old trash protects old coins. Are you willing?

And that's just it!
I'm now of a different mindset. For the past few years........ I have been running iron discrimination (via a form of tone-break).....on what ever unit I'm using (((usually Manticore............sometimes D2)))........ in carpets of nails. Extremely low tone-break/Ferrous Limits/Iron Disc....in carpets of nails.....sure does induce a lot more 'falsing'.......yet........also allows a non-ferrous target (amongst nails) .... to burp through the headphones ...a bit more readily.
BUT......... here is what I have REALLY changed =
I now (more than ever) dig: micro-pits. ---- I find a (potentially heavily masked) non-ferrous target....with a metal detector....in carpets of nails. I dig a 10" x 10" x 10" plug. Yesteryear....... I would try to find the non-ferrous target as quick as possible.....and move on. Now........today........ I remove EVERY piece of metal out of the dug plug. Then........ I ALSO put the pinpointer down in the hole....and 'micro-pit' dig. This small 10" pit (hole) will get every piece of metal ...recovered out of the hole....... using a Fisher F-Pulse pinpointer (deepest pinpointer on the market......as of current time). I am always surprised as to 'how many' metallic implements come out of the ground. MOST are ferrous. Some are non-ferrous . , . , . , . , . , . , . and some of these non-ferrous targets are a genuine 'surprise'. Right now......... I ONLY dig micro-pits (and mini-pits) in areas that are heavily littered with SQUARE nails. (Older-generation nails).
Recently........ I have been digging mini-pits. This is performed without a detector. Only a shovel and a pinpointer. I'll dig a 2-foot x 2-foot x 2-foot plug out of the ground....... in a prime location....... and have-at-it with a N52 (very strong) Rare Earth magnet in one hand........ and the Fisher F-Pulse pinpointer in the other hand. ((( I love it.... when the magnet is NOT picking up the pinpointer-detected target!!! ))) My most recent site..... is producing 27 nails...... to 1 non-ferrous target. 27:1 ratio. When you come home with 25 - 30 non-ferrous targets...... one or two of them....... are bound to be good 'keepers'.

In Ft. Meade, Florida....... at a even older site(s)....... I would dig regular 'pits'. These usually ended up being 13-feet x 9-feet (by......down to: 31" deep). I was averaging 105:1 .....ferrous-to-non-ferrous ratio volume of targets. Sometimes the non-ferrous target....would be VERY significant.
In Archaeological site recovery......... I would dig multiple 1-Meter X 1-Meter pits.

In a nutshell: You would be SHOCKED as to 'how' terrible today's metal detectors are....at unmasking. It's: THE PAINFUL TRUTH.
A pit-dig will: Expose! A pit-dig is: an eye-opener.

Yes....... it takes a certain monomaniac/psychosis mindset to perform micro-pit, mini-pit & pit digs.
IF you want to dabble into this....... I would recommend starting out ONLY with micro-pit digs........ a small N52 Rare Earth magnet....... and a superior pinpointer. ONLY perform this in carpets of square-nails........ meaning: high human co-habitation/traffic......with age/era.