English PD

[manuchal]

I want to build ..what is this geo its real long range detector ? Or scam again ?

[manuchal]

The circuit is originally Cscope 950

I have a box like those from old radios… could you tell me more about what it’s used for?

[rider]

I assume you have the original scope board.
First of all, you should remove the capacitors that are mounted on the board in parallel with the transmit coil.
I believe the transmit coil should have about 150 turns, and the receive coil 10 to 15 turns of 0.2 mm wire.
You have the VOLUME and SENS knobs roughly in the middle, and the DISCR on D1.
With the REJECT control, you try to find one or two points where you can hear a sound.
Also, the transmit coil should be positioned slightly ahead of the center of the ferrite, and the receive coil should be in front.

[skyeffect]

I assume you have the original scope board.
First of all, you should remove the capacitors that are mounted on the board in parallel with the transmit coil.
I believe the transmit coil should have about 150 turns, and the receive coil 10 to 15 turns of 0.2 mm wire.
You have the VOLUME and SENS knobs roughly in the middle, and the DISCR on D1.
With the REJECT control, you try to find one or two points where you can hear a sound.
Also, the transmit coil should be positioned slightly ahead of the center of the ferrite, and the receive coil should be in front.

Should I be measuring something specific in mV at the output of the LM741? Is metal discrimination needed or not in the oscillator? Is there anything in particular I should watch out for?

[rider]

It’s not necessary to measure anything. It’s unclear exactly how it works — but it does work. All the control is done through the reject button. You may need to press the reset button several times, and it behaves differently when reject is in position 1 than when it’s in position 7 or 8. There are many details that make a difference, and the ferrite is one of the most important factors — as well as the construction and the position of the coil on the ferrite.

[skyeffect]

It’s not necessary to measure anything. It’s unclear exactly how it works — but it does work. All the control is done through the reject button. You may need to press the reset button several times, and it behaves differently when reject is in position 1 than when it’s in position 7 or 8. There are many details that make a difference, and the ferrite is one of the most important factors — as well as the construction and the position of the coil on the ferrite.

Does it actually detect gold from a distance? Should it work and detect gold like a local detector, or only from far away? I mean, for my test, should I place a coin across the room in the corner, or will it initially detect gold only about 15 centimeters in front?

[manuchal]

This lrl don't detects horizons if u have the proper ferrite. It is a very complex lrl so its very dificult for anyone to teach u how to calibrate it (only with the right ferrite). The best way is to see a workable one but it is n't so easy...

Do you have Geo work with this .. ? what is your experience with this.. maybe your experience will help

[Geo]

I own a workable one. I have locate objects at distance biger than 300m. You can\t pinpoint with it but only by triagle. All the story is the "special" ferrite, i have try maybe 1000+ ferrites but only one worked, i never learned the reason.

[skyeffect]

I’m working with the original Cscope PCB and I’d like to know if it operates correctly without any modifications — meaning no components added or removed from the original layout.
Also, assuming the ferrite core is already in place, what’s the correct way to tune or adjust the circuit? Should I focus on the coil resonance, the frequency trim, or is there another step needed for proper calibration?

Any tips or reference points for fine-tuning would be really appreciated.




Thanks in advance!

[manuchal]

Why are you so secretive and unwilling to help spread knowledge? Will you take it with you to the grave? At least give us a small hint, a little lesson on how to tune this, so that we too might find the magic ferrite… though we all know that the ferrite alone isn’t enough, right?