Would a 2.5 m coil frame work?

[MDfanatic]

You're welcome. Mine is pretty stable. The one who made it said the felezjoo on the internet is very unstable. He claims to make some modification on the original version. I can't tell what he did but his version is certainly stable. But I never used one that was made exactly like Hamid's original schematics.

It would be interesting if you took some photos of the board, if possible. I've seen a PCB that's different than the original but I can't find any information.

[AmmarFoggara]

doing more much frame you lose out the depth to small targets. you can NOT deceive physics rules.

You mean the depth is effective only for large targets? That makes sense I guess. But would a chest for example be big enough? Or a big jar full of coins be detectable by it?

[AmmarFoggara]

It would be interesting if you took some photos of the board, if possible. I've seen a PCB that's different than the original but I can't find any information.

A friend of mine did open the box but he told me that the maker used some sort of glue to keep the side with the components hidden. You need hot air to detach it, I believe. I just didn't want to risk it. I swear I even thought of sending it over to one of the mods so they can share the schematic with the community if they find it to be really stable enough. Because I read the thread about felezjoo here and you guys deserve it because you're so helpful to each other. Maybe one day I will do it. If I can afford to buy another copy.

[Carl-NC]

You mean the depth is effective only for large targets? That makes sense I guess. But would a chest for example be big enough? Or a big jar full of coins be detectable by it?

A 2.5m coil might detect an automobile at 10m.

[pito]

I think for such target magnetometer can be used.

[Altra]

A full jar of coins is the difficult target. Some where on the forum there is a thread that covers this topic.

[Carl-NC]

I think for such target magnetometer can be used.

If he was looking for a car, yes. The point is, it takes a very large piece of metal to get the depth he wants. As Altra points out, when the pieces are small, even when there are lots of them, things get very difficult. I doubt you could detect a 20L bucket of gold coins at more than 3m.

[AmmarFoggara]

If he was looking for a car, yes. The point is, it takes a very large piece of metal to get the depth he wants. As Altra points out, when the pieces are small, even when there are lots of them, things get very difficult. I doubt you could detect a 20L bucket of gold coins at more than 3m.

You have way more experience with detector than me, obviously. But I beg to differ. I think there are a lot of factors that control how deep the target can be detected. The shape, the density, the metal type, the void around it, its position. I certainly won't hope to find a jar at that depth. But perhaps, if it can find a car at 10m, it won't miss a chest at 5m. Felejzoo is a powerful machine. It just needs some intelligence and creativity to make the best of it. For instance, we got an ID of 40 to 50 with 1.25 frame. We dug 3.5m down and we're yet to find the metal object that gave that reading. Perhaps, it's the soil or some mineral combinations in it. Maybe it's a big target. The ID was given in an area that's nearly 4x1m. All surrounding areas only gave above 67. The reason is that big frames are too sensitive to soil and needs to be held high when detecting. But when a unique id is given in a geometrically distinct shaped area, you need to pay attention. Almost like a gpr data processing. But you only got your brain to do the processing. Maybe I'll report back if we find anything. So the community will benefit from the experience.

[Carl-NC]

It's important to do target testing before going out in the field so that you know what the device is capable of. You could build a 2.5m coil in an hour or two, and in a short while you will know what it can and cannot detect. If I were looking for voids or fringe targets I would hook up a data logger, grid-search the area, and plot the results. You will see far more that way.

[AmmarFoggara]

I think for such target magnetometer can be used.

I think it won't be effective deeper than 2 m from what I've seen so far.

[pito]

Magnetometers are more effective than metal detectors for iron targets. Years ago I built magnetometer which was able detect this rotating magnet ( remote controlled ) from distance 11 m.

[AmmarFoggara]

Magnetometers are more effective than metal detectors for iron targets. Years ago I built magnetometer which was able detect this rotating magnet ( remote controlled ) from distance 11 m.

That's impressive. But is less effective for other metals?

[AmmarFoggara]

If he was looking for a car, yes. The point is, it takes a very large piece of metal to get the depth he wants. As Altra points out, when the pieces are small, even when there are lots of them, things get very difficult. I doubt you could detect a 20L bucket of gold coins at more than 3m.

Wait a second, does this mean that the control unit is small and won't be visible for the coil if I create shoulders straps and make this a one man device?

[AmmarFoggara]

It's important to do target testing before going out in the field so that you know what the device is capable of. You could build a 2.5m coil in an hour or two, and in a short while you will know what it can and cannot detect. If I were looking for voids or fringe targets I would hook up a data logger, grid-search the area, and plot the results. You will see far more that way.

I would love to hook a data logger to my felezjo. That would be great.

[AmmarFoggara]

A full jar of coins is the difficult target. Some where on the forum there is a thread that covers this topic.

Link, please. Or is it easy to find?