dch 85 pistol

[Sreekumar]

I"am build this circuit,i use nicolas pdk audio amplifier led is off ,how to detect target

[WM6]

Originally Posted by Sreekumar

,how to detect target

Detecting target is very easy, if you know where target is hidden.




.

[Sreekumar]

[QUOTE=WM6;159669]Detecting target is very easy, if you know
where target hidden
I build the circuit,led is off but

[Sreekumar]

Is it possible to use audio amplifier instead
Of a beep generetor

[Morgan]

maybe you should try the oscillator coil in HORIZONTAL position

[Pahom]

Yes, there is progress on this project. But it is not clear how correctly .... You can configure the output from lm741 so that the response from the target is either positive or negative.

[Morgan]

Originally Posted by taxma1981

https://ibb.co/kKSMke
https://ibb.co/nMfVdz

Hello

you built the DCH project , for me this schematics has some mistakes,
is it working fine ?

[shahrayar]

Does it have to be a specific frequency? I used 156 Hz, the last frequency is about 4 kHz
I used a loudspeaker
Can you explain more

[shahrayar]

Possible some blueprints for this pistol

[shahrayar]

[shahrayar]

When you turn it on, you hear a beep, then it is only affected by gold
https://www.longrangelocators.com/fo...1&d=1633449261
https://www.longrangelocators.com/fo...1&d=1633449261

[Pahom]

Everything is correct. Everything is the same in the assembled layout. But when you tune with the oscillator to the desired threshold, everything works fine. Only the distance is not great. And that is why those who gathered do not use this project. A small detection distance, although there is a choice of metal search. The most long-range one that has been demonstrated on the forum today is MORGAN's PDK 60-90 meters for a small target!

[kostas87]

Originally Posted by Pahom

Everything is correct. Everything is the same in the assembled layout. But when you tune with the oscillator to the desired threshold, everything works fine. Only the distance is not great. And that is why those who gathered do not use this project. A small detection distance, although there is a choice of metal search. The most long-range one that has been demonstrated on the forum today is MORGAN's PDK 60-90 meters for a small target!

hello my friend Alexander! dch 85 works for buried metals in your area in Russia; it does not matter if it is for 4 meters or 30 meters, The magic is to detect from a distance ...

[Pahom]

Originally Posted by kostas87

hello my friend Alexander! dch 85 works for buried metals in your area in Russia; it does not matter if it is for 4 meters or 30 meters, The magic is to detect from a distance ...

Hi Costas! So far, everything is only at the polygon. I need to figure out a lot more, for example, with coils ... silver, gold, that this is a filter ... or the reception frequency is changing is not clear yet.

[kostas87]

Originally Posted by Pahom

Hi Costas! So far, everything is only at the polygon. I need to figure out a lot more, for example, with coils ... silver, gold, that this is a filter ... or the reception frequency is changing is not clear yet.

from information I have from Brazil, they say that dh3 is very good, similar to 85dch shematic ... it detects many metals together. gold, silver, aluminum, copper ... without operating frequency it is better to detect a phenomenon, if you try to no one tuning may not work well ... try to detect the phenomenon as energy, not as frequency ...good luck my friend 🙏

[Geo]

Hi !!!

DCH85 is a static detector, not catch magnetic fields so it has n't stable properties.
It can detect an object from 30m today and another day from 3m or zero.
But if phenomenon is strong then it works for sure!!!

[Morgan]

Originally Posted by folharin

Attachment 18641
part energy source

Hello

you gave info about:

OSCILLATOR CIRCUIT

RECEPTOR

BEEPER CIRCUIT

VOLTAGE REGULATOR CIRCUIT (no info)


are you sure this schematic is working ?

[Morgan]

Originally Posted by Geo

Hi !!!

DCH85 is a static detector, not catch magnetic fields so it has n't stable properties.
It can detect an object from 30m today and another day from 3m or zero.
But if phenomenon is strong then it works for sure!!!

also if umidity is more than 85% the electrostatic locator not work very well...

One question, do you built this DCH of Folharin,is it a working project ?

[Geo]

I have work with it many years ago.
It is the basic schematic of Iconos or blue pistol from Esteban..... you remember.

[abdou2014]

Originally Posted by Geo

Hi !!!

DCH85 is a static detector, not catch magnetic fields so it has n't stable properties.
It can detect an object from 30m today and another day from 3m or zero.
But if phenomenon is strong then it works for sure!!!

hi Geo, you speak about the complete circuit with TDA or without ???

[Geo]

I speak for simple DCH85 without TDA (2 transistors input and 741)

[abdou2014]

Thanks, is the stimulator necessary ?

[Geo]

Yes...

[abdou2014]

Thanks , does this stimulator work well with DCH85 ???

[Geo]

Why you ask for the stimulator of DCH????