Pulse Detector Depth Proformance

[ivconic]

i have really tried hard to get good proformance from basic designs like surf pi but really there is only so far you can go with these circuits...ive had problems with earth cancell with nearly all my surf pi projects...and you come to a point where you feel like giving up trying.....its ok for people who can afford GPX Lorentz tdi pro's but im not in a situation where i can afford one...i just want to have a chance against other detectorists who have machines with good depth cause where i live most gold items and old coins are deep like 18" plus...tdi pro or maybe gs 5 could have given me a chance of some success but they are out of my reach....sometimes i wish i had the knowledge to make a really deep seeking detector from scratch but because of my depression and anxiety problems and lack of expertise its hard for me to do...i just get so frustrated...Nexus i always thought pi detectors go deeper in wet sand than in air ????

You are not alone. More/less majority of us feels the same most of the time.
But, read Quiaozhi's story about rally again and take it as ultimate truth and rule.
Most precious finds in my "career" were not deeper than just few inches bellow the surface.
Every once in a while there is rare find, deeper than that, but statistic is mostly in shallow finds favor.
Main "element" is still luck. And random coincidents.
You don't need "heavy artillery" to catch gold coin; you need luck.
And patience.
SurfPi, Barracuda and look a likes are all lacking of GB circuitry, so there is no wonder why are you experiencing troubles.
PPS at 600Hz and "fast" coil on such machine will constantly struggle with ground conditions.
Make SMW or "Magnum on steroids" if you want to go much deeper. But be ready to dig lot of irons too.

[ivconic]

BTW...
that's why this is so great and real, because it displays 101% reality from our hobby:
http://www.imdb.com/title/tt4082744/

[RH-Lightning]

daverave
this attitude leads to depression. ask any experienced detectorist if they got a lot more finds when they moved from middle level to top level detector. no, they did not. it is how good you understand and feel your machine.

Detectorists TV show is one of the best ever

[ivconic]

daverave
this attitude leads to depression. ask any experienced detectorist if they got a lot more finds when they moved from middle level to top level detector. no, they did not. it is how good you understand and feel your machine.
Detectorists TV show is one of the best ever

"...ask any experienced detectorist if they got a lot more finds when they moved from middle level to top level detector..."

Sad truth!
I was much more successful let's say with Cscope 1220B than now with XP Deus.
50 times more!
It's because of several reasons;
-fields were not that exhausted back than as they are now,
-"weaker" detectors do demands more user's involvements, which is good in a way; you have more patience and you are more careful,
-despite the great technology involved in; it is still damn stupid machine, you can't rely on it's accuracy more than 30-40%, the rest of job is on you to decide about detected signal..
and so on and so on...

[Qiaozhi]

daverave
this attitude leads to depression. ask any experienced detectorist if they got a lot more finds when they moved from middle level to top level detector. no, they did not. it is how good you understand and feel your machine.

That reminds me of another story. I was in a metal detector shop several years ago, and got talking to a guy there who was looking at some of the newer detectors. He and his friend had both purchased a Whites Classic 1, and on their very first outing his friend unearthed a gold torc bracelet worth about £2,000. He was complaining because up to that day he hadn't found anything of value with his own Whites Classic. His friend then immediately upgraded to the latest and greatest detector (don't remember which one he said) but since then he also hadn't found anything significant either. Which just goes to show that you need to have the coil over the target in order to find it, and you don't necessarily need to have what you think is the ultimate detector.

[daverave]

Hi George...i know what your saying but where i detect on the local beaches good targets are drying up partly cause of some local detectorists who want it all and are hammering the beaches nearly every day with good proformance machines...even old pennies which use to be so common to find are now not hardly being found so the guy i mentioned who has made this deep detector has said that the heavier gold rings and old pennies are now out of range even from detectors like dual fields and some minelabs...one guy who detects nearly every day has bought a white's tdi sl and he is finding gold rings again from worked out places....so i cannot compete with these other guys so it makes one feel like giving up...the guy with the home made deep detector said like about summer finds on the beach coming up....but i dont like having always to compete with other people...and just like to be maybe on a local beach by myself looking for maybe some old items with a machine that has the depth to find out of reach very old items which is more of a challenge to me....maybe im loosing the plot

[Nexus]

..Nexus i always thought pi detectors go deeper in wet sand than in air ????

I have worked with and tested for a year the GPX5000, Garrett ATX and some other PI detectors amongst which some home projects. I have found no evidence of more depth in wet sand or soil vs air.
I would advise you to get out with some of those folks that claim the insane depths and measure with a tape their pot holes while they are digging. You will find that there a lot of bst in people's claims.

[Nexus]

daverave
this attitude leads to depression. ask any experienced detectorist if they got a lot more finds when they moved from middle level to top level detector. no, they did not. it is how good you understand and feel your machine.

Detectorists TV show is one of the best ever

Top level detector would suggest more depth and with it more fiddling with proper target ID. If you get to dig deeper holes you will end up in the end of the day with less finds, as digging holes takes time.
Experienced detector users do not concern them selves with number of finds, but their value and quality.
The really cool stuff are still deep down well out of range for most machines.

[N@SKO]

The only PI detector that can get this kind of depth on modern coins is the GPX from Minelab and perhaps the Lorentz.
Since no one have ever managed to copy these two I do not see how anyone with another much less advanced PI would get these depths. I wouldn't worry much if I was in your place as these claims are quite far fetched.
When folks bury coins at the bottom of a hole they can get even 25" depths, but those are not real results as every pot hole will enhance the signal strength from any target.

Your Nexus MP detector can you find ancient coin at that depth?

[daverave]

I have worked with and tested for a year the GPX5000, Garrett ATX and some other PI detectors amongst which some home projects. I have found no evidence of more depth in wet sand or soil vs air.
I would advise you to get out with some of those folks that claim the insane depths and measure with a tape their pot holes while they are digging. You will find that there a lot of bst in people's claims.

i didnt know that as i was always under the impression that pulse detectors went deeper in wet sand than air...its something i never really tested for in the past.

[bbsailor]

Hi George...i know what your saying but where i detect on the local beaches good targets are drying up partly cause of some local detectorists who want it all and are hammering the beaches nearly every day with good proformance machines...even old pennies which use to be so common to find are now not hardly being found so the guy i mentioned who has made this deep detector has said that the heavier gold rings and old pennies are now out of range even from detectors like dual fields and some minelabs...one guy who detects nearly every day has bought a white's tdi sl and he is finding gold rings again from worked out places....so i cannot compete with these other guys so it makes one feel like giving up...the guy with the home made deep detector said like about summer finds on the beach coming up....but i dont like having always to compete with other people...and just like to be maybe on a local beach by myself looking for maybe some old items with a machine that has the depth to find out of reach very old items which is more of a challenge to me....maybe im loosing the plot

Dave, and everyone hitting the beach,

Learn to read the beach and find out how deep the hard pack is beneath the loose sand. Most targets in loose sand will gradually sink while the water and waves saturate the sand and then fall down to the layer of the hard pack. Observe the beach wear and first hunt in areas where the loose sand layer is thin or missing due to beach erosion.

In my area, the New Jersey Shore, the spring season brings in more sand and coins get thrown up on the beach. When I find a quarter or heavy coin, I hunt parallel to the water at this point and most coins I find will be quarters or heavier coins. Smaller and lighter coins will be higher up on the beach. The coins seem to be separated by size and weight in lines parallel to the water.

Every beach is different due to:
1. Sand grain size and shape
2. Beach slope and areas of erosion
3. Angle of beach to the prevailing wind and wave action
4. Areas of high beach use in the warm season.

I hope this adds another perspective on finding good things on the beach!

Joseph J. Rogowski

[Ferric Toes]

i didnt know that as i was always under the impression that pulse detectors went deeper in wet sand than air...its something i never really tested for in the past.

PI detectors often do go deeper in wet sand provided it is on a conductive sea water beach. On a freshwater lake beach this does not happen. The reason is that although sea water is very much less conductive than any metal, it has a bulk conductivity effect when under the coil. What this means is that eddy currents are induced in the wet sand which diffuse downwards and outwards. These rapidly decaying currents in the sand also induce eddy currents in a coin or ring in the sand, which has the effect of enhancing the field from the coil. Another way of describing it is that it makes the coil appear electrically closer to the target than it really is, hence you can also detect it at a greater range.

This effect has also been observed in geophysical prospecting when looking for metallic orebodies in conductive overburden.

Eric.

[daverave]

i see what you mean about eddy currents being induced into the wet sand and causing a greater range on metal targets...would that give say another inch or two on a fair sized ring or coin ???

[Funfinder]

You have to stop thinking to end the depression and your wife should cheer you up. LOL
And then get the Makro Racer with vibration and listen to good music while hunting.

Detailed seen of course there's a difference between (bad) thoughts aka feelings and brain-chemistry:

Per instance It feels painful for my "inner me" when I (it) think(s) about losses which would have been avoidable.
The chemical depression instead is comparable with a really bad hangover after a very long party-night.

The brain strives to feel good or even high by special neuro-transmitters (endorphines, esp. dopamine)
which can cause addictions. To survive, the brain constructed some sort of reward-punishment-system.
The living creature feels satisfaction when it had been successful with looking for food etc.
And for reproduction the brain also kicks in with "staying-together-hormone" oxytocine as reward-system
for striving for sex which even can make the mind "dizzy".

To avoid "brain-chemical" depressions it is important to live healthy - that's clear.
People who only function normally when they drink alot coffee or smoke 40 cigarettes a day
have trained their brain to "calm down" or "wake up" depending on the situation to feel better.
In principle this works like a pain-killer or motivation-pusher but the brain might suffer when
it wants to work against this artificial chemistry like it also happens at the hangover-time.
People addicted to heroine feel very bad when they are not on the drug.

Going out with the metal-detector, having fresh air, bright daylight and seeing distracting things
of course is healthy for the brain-chemistry but also to get rid of "problem-deep-thinking".
However, the brain must not be poisoned by drugs which makes it depressive and
Anti-Depressivas are no wonder-medicine to live all day inside some pink cloud.
Psychoactive substances even can create extreme hyper-sensitivity and then life
can become a real nightmare, because all problems for the brain look extremely huge.


Concerning troublesome thoughts the whole point is motivation:
How lucrative the day can become so it's worth jumping out of the bed!
Lucrative work helps very good because it's distraction and reward in one.

So of course it's logically if someone likes to have a good metal-detector
to raise the chances for success (inclusive his own pleasureful thoughts).
But the personal point of view is at least equally important!


Taking life too seriously leads to frustrating thoughts
while taking it easy and laughing about it leads to joy!
Laughing is a very good medicine against depressions
so its indicated to look for funny and amusing things.

For men it's also adviced to avoid women who are "drama queens"
and who spread the whole day all kind of hyper-sensitive feelings!
They like to make out of every little emotional fly an elephant just for
standing in the middle of all attention - of course this is frustrating!
What they are doing is called: "emotional-environmentally pollution"
which can drive anyone nearby crazy.

Women are crying all the time but men are those who commit much more often
suicide! This truth shows clearly how are the relations of psychic problems in reality!
Lamenting women should be ignored completely even if they start to refuse sex!


Another good trick against depressions is simply thinking about all kind of
wishes and things which would make the personal life really enjoyable and
next becoming active to do something to make those wishes become true.


And last but not least:
Sometimes it's really better not thinking at all and just let the time take care!
Because there is no solution possible or available at the actual moment anyway!

[Nexus]

Your Nexus MP detector can you find ancient coin at that depth?

Since we have not seen a tape measure what exactly is this depth? I do not trust eye estimates to be accurate enough for any conclusion.
For the record the MP with 13"DD can detect Roman denarius at 35 cm in real search and sesterci (at least 32mm) at 45 cm with reasonable signal. The masters of faint signals could get even better results.