dch 85 pistol

[Sreekumar]

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

[WM6]

,how to detect target

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




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[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]

DCH by Folharim

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/forums/attachment.php?attachmentid=20811&stc=1&d=1633449261

https://www.longrangelocators.com/forums/attachment.php?attachmentid=20812&stc=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]

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]

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]

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 🙏