circuit info

[Clondike Clad]

Do anyone have this circuit or can tell me how this thig works

[Carl-NC]

It's a Compass "Depth Doubler". Supposedly injects charge into the ground and increases detection depth.

- Carl

[geo]

Carl does it work

[Carl-NC]

I don't know. Actually, I own two of them, and have yet to try them out. It's on my very long list of things to do.

- Carl

[dfas-eu]

compass depth doubler

did you finaly try them?

Is anybody got one for sale? Would like to try them out myself.

Harry,

[Sean_Goddard]

It is NOT actually made by Compass, just some guy illegally using the name, NOW, interesting point.

I was once detecting in a field in which an electric fence with a faulty insulator was operating (?) every time this thing pulsed, it seemed to "energise" the ground somehow. The depths I was finding targets at were just insane, so maybe there's something in this I suppose pumping a high power signal (at the same frequency of your detector) into the ground might just have an effect.

Maybe I'll cobble up a circuit to try this one day.

[Geo]

I heard that it uses a lot of electrodes in different frequencies in order to reject the false signals from difference rocks

[Max]

It is NOT actually made by Compass, just some guy illegally using the name, NOW, interesting point.

I was once detecting in a field in which an electric fence with a faulty insulator was operating (?) every time this thing pulsed, it seemed to "energise" the ground somehow. The depths I was finding targets at were just insane, so maybe there's something in this I suppose pumping a high power signal (at the same frequency of your detector) into the ground might just have an effect.

Maybe I'll cobble up a circuit to try this one day.

Hi,
think that a pulse signal that produce infinite frequencies spectrum can make gain in depth in a fixed frequency detector. When pulse shuts down eddy currents flows in conductive targets (metal) much more easy than in the matrix then resulting in a continuos spectrum of frequencies emitted by the taget itself. A good detector could then reveals easy amplitude variations due to imbalance produced by its receive frequency signal summed to emitted ones.
So think can work this way. But also false can be much more frequent. Think e.g. at disc false and thin metal detection e.g. foil that would be much more present than without this pumping of energy.
A similar type of circuit is when in PI detectors one uses a large on-ground coil (e.g. 5x5mt , 10x10mt or more) to have only rx coil transported by operator - both connected to the main unit.

Best regards,
Max