two box

[pito]

Out of curiosity, I made a simplified version as in post #70, it works well, the cola can is detected from 80 cm, the only thing missing is ground balance, I am thinking to adopt it from other schemes, any sugestions welcome.

[kt315]

1200-1500V pulse and 10-20A in coil. Delta Pulse ))) no wish to answer here more... ended matter for me.

[pito]

simplest two-box .

It is not simplest yet, with TC4422 I have 200 Vpp on Tx compared to 180 Vpp in original 4 transistors design,
on the way 22cm Tx coil with the same EMF strength emission.

Отправлено: 30.05.05 08:57. Заголовок: Re: А зачем в схеме предусмотрены отводы от счетчика? Что-то 120 вольт достичь пока не удается. Спасибо: 0
IRF840 постоянный участник	Отправлено: 31.05.05 06:09. Заголовок: Re: Раскачалось аж до 180 вольт.

[kt315]

I found the answer.
переключатель на плюс - прибор индицирует высокую минерализацию ( все металлы ),
на минус - низкую минерализацию ( пустоты )

it is just experimental device in try to make/get simplest two-box one based on Whites VLF Classic circuit.
this switch is supposed to check in real field conditions. nothing more.

[pito]

I found the answer.
переключатель на плюс - прибор индицирует высокую минерализацию ( все металлы ),
на минус - низкую минерализацию ( пустоты )

[pito]

What for there is switch S1 ?
It is turning upside down the graph and what is benefit of that ?

[pustareka]

https://sevzirfo.narod.ru/trlocator.htm
https://translate.yandex.ru

Simple Deep-T/R Locator ver1.0

This metal detector is designed to search for LARGE objects made of non-ferrous and ferrous metals. The scheme does not provide compensation for the influence of the earth, so you can search only on poorly mineralized soils. Sensitivity to small objects such as shell casings, nails and small fragments is sharply reduced. It is possible to search for voids and inhomogeneities in the soil by the difference in soil conductivity.

The maximum depth of detection obtained in practice :

Sheet of roofing iron 50x150cm - 3m (by air)

Passenger car............................... - 4m (by air)

The detector operates in dynamic mode and does not require manual zero setting. The operating frequency is 2 kHz. The amplitude of the voltage on the transmitting coil is 120 volts. Coils with a diameter of 38 cm of 150 turns of copper wire in enamel insulation with a section of 0.4 mm. Both coils are shielded with foil, a small area of 0.5-1cm is left free from the foil (to prevent the formation of a closed loop).

Diagram of T/R Locator ver1.0 in GIF format............................................ .... GIF 26KB

Printed circuit board T/R Locator ver1.0 in Sprint-Layout 3.0 format.......... RAR 27KB

Design features can be viewed HERE

The finds made with the help of this metal detector can be viewed HERE

[pito]

More simple, L -Tx can be reduced to 30 cm and 180 turns, L- Rx 20cm and 200 turns.

[bernte_one]

Hi Carl, Hi Forum,

the discussion about "two-box" detector is reopened... My T/R Locator PCB's for testing have arrived today.

much succes, hope for a short testing video

[ivconic]

Hi Carl, Hi Forum,

the discussion about "two-box" detector is reopened... My T/R Locator PCB's for testing have arrived today.

Once you finish it; please inform us about your impressions.
Also would be nice to record short video demonstration and put on Youtube.

[GeoMax]

Hi Carl, Hi Forum,

the discussion about "two-box" detector is reopened... My T/R Locator PCB's for testing have arrived today.

[Carl-NC]

Please keep the discussion on metal detectors, thanks.

[ivconic]

This has nothing to do with year and age. This is a trend.
For many years we have been hearing that such things are happening in the USA.
We count; ok, USA is a huge country with many people.
In such a mass, there is always someone mentally disturbed, and it is difficult to monitor every individual in such a large system.
Which of course is no excuse because the consequences are catastrophic.
There are probably 200 million people in the US who own guns.
And yet those 200 million don't decide to take to the streets and kill everyone around them. So it's not a problem with weapons.
The problem is in sanctioning such sick idiots and jerks.
In super small Serbia with 6-7 million inhabitants, there are probably a million people who have weapons at home.
And again, not all of them decided to start killing around them in turn.
So... the sanctions system is wrong.
Too many "human rights" have been given to those who should have no rights.
But until recently, we mostly watched it in the USA.
A certain number of years ago, a terrible tragedy happened in Norway with that small-minded jerk "breivik".
And then I was very mad and angry because the system did not "clean" him but kept him in a cell which is better than many hotel rooms.
That horribly disgusting snitch has access to the Internet, has a "fan club", corresponds, writes books, spreads his philosophy.
And for the rest of his life, he was "sentenced" to a clean room, neat meals, without any obligations.
That way, that pig won't realize what he did and won't pay anything.
"It" will enjoy comfort for the rest of its life, at the expense of taxpayers.
All this for the sake of preserving "democracy" and "human rights"!??
And where are the human rights of the innocent victims?
But, as I said, "it happened with them", it doesn't happen "with us". Unfortunately, since yesterday it "happens here too".
The trend is spreading. And the whole world is affected.
I am furious because now and since yesterday I have been listening to similar "democrats" and "fighters for human rights" whose mouths
are full of regret for that murderer, and few of them remember the victims!??
I am furious because "someone" is turning everything upside down, totally against common sense.
That Norwegian "breivik" and this little 14 year old nasty jerk; if I were asked: they would be impaled, but in such a way that they would not die immediately,
but die slowly for days, in front of the cameras, with a live broadcast, for the whole nation to watch.
For many reasons.
First, because it is the only satisfactory justice. Second, because it will serve as an example to all the other as yet undiscovered jerks,
it will be a very clear warning to them of what awaits them if they follow the same path.
And that is the only way to educate the masses. Especially those young hotheads.
Are we so pretentious and overbearing that we believe that in ancient Rome (for example) they were more stupid and backward than we are today?
If they didn't know what human rights are and what justice is?
Let's not fool ourselves, we haven't taken a single step forward since then, on the contrary,
with all these strong soulful "fighters for human rights" we have only gone back aeons even compared to ancient Rome.
And the Bible says "an eye for an eye and a tooth for a tooth", and I say, if you want to prevent such a thing from happening again,
then "10 eyes for an eye and 10 teeth for a tooth".
I'm furious, I'm furious.
Because it is clear why all this is happening.
Why do we have an increasing number of such cases on the planet. We have rushed too far into the "future".
The death penalty is the only solution.
I would go all the way, impaling and suffering for days before death, for all such criminals.
If any of you disagree with me on this; please then contact the families of the victims and explain to them what justice is.

[freso]

A 14-year-old boy killed his schoolmates, that never happened..Sorry Ivica for answering instead of you

Sorry to hear that... Teanage is an unpredectable period in life

[Orbit]

Tell us what happened?

A 14-year-old boy killed his schoolmates, that never happened..Sorry Ivica for answering instead of you