field test unit no 001 "model T"

[Davor]

Until you announce what that exactly is, urbi et orbi, be prepared for more seasoned questions. A paradigm shift is always questioned from the perspective of the old one.

[moodz]

Until you announce what that exactly is, urbi et orbi, be prepared for more seasoned questions. A paradigm shift is always questioned from the perspective of the old one.

I suppose so .... my patent guy says I shouldn't even post here so I will go quiet for a while as I build up some different prototypes. ... cheers and thanks for all the fish.

[Davor]

Bye Mr. Dolphin, see you once the patent is lodged

[UrbanFox]

2. Ferrite rods have no impact.

You are not trying!!

[sido]

Bye Mr. Dolphin, see you once the patent is lodged

We hope so, but afraid maybe not. Good luck with it Moodz

[maca404]

Been away from this thread to ages lots gone on I see, from what I have read moodz is taking this from a openly shared project to his own private comercial design ?. Bit of a shame but I guess most good open projects go that way when there is a bob in sight, I hope it all works out it would be awesome to see this as a finished product.

[moodz]

...been slaving over a hot soldering iron all day here LOL ....the first version of the detector is finished and I am conducting field tests ....so far so good .... I have one small problem that is on the verge of being solved .. the current detector auto ground balances however it is very sensitive to magnetic fields ( eg earth field and magnets of course ).. With an 18 inch mono coil the unit picks up a handheld magnet from 12 feet away which is not good unless you want to detect magnets ...however the plus side is that this means my signal processing channels are working well.

[authere]

Hi Moodz,

Great to hear you are onto the build,looking forward to having a M/L beating machine and a alternative choice for us prospectors....one thing i can relate to is when i made a 1mx1m square coil i could get a beer can at 6'(empty of course!!)

Ron

[moodz]

Hi Moodz,

Great to hear you are onto the build,looking forward to having a M/L beating machine and a alternative choice for us prospectors....one thing i can relate to is when i made a 1mx1m square coil i could get a beer can at 6'(empty of course!!)

Ron

Thanks Ron .. I'm not really trying to compete with anyone but I am aiming for a beer can at 6 feet with a 18 inch coil ... and I reckon I will get there..... I will know in the next few days

[authere]

Hi Moodz,

Whether you like it or not you are competing and doing a damn fine job of it as well!!!!

I can see the sweat pouring off their brows, lets hope it comes together as predicted and starts us off on a new adventure that opens up the prospecting fields everywhere!!

It'd make a fantastic christmas present for someone we all know!

Ron

[Sean_Goddard]

Hi Midas, good to see the positive results. I've decided my problem it's some sort of strange issue with the analog CRO setup, so I might go and have a look on EBay for a digital replacement.

Mick

Just a thought, WHERE are you connecting the 'scope "ground"? I've spent hours hunting a fault only to find I'd got my connection point wrong and so I was upsetting the circuit operation but then sometimes a box of rocks has a higher IQ then me!

[UrbanFox]

.... the current detector auto ground balances however it is very sensitive to magnetic fields

Moodz, doesn't your detector cancel static magnetic fields ?????????????

( eg..... and magnets of course )....

Moodz, how are you testing this ?????

Is the magnet stationary and the coil moving ?????

Is the coil stationary and the magnet moving ???????

one small problem

All the best with it. I am interested to know how you can make any comment re the potential depth performance until you fix up the earth's magnetic field. I consider you have one large problem, not a small one, but again. all the best with it.

[moodz]

Moodz, doesn't your detector cancel static magnetic fields ?????????????



Moodz, how are you testing this ?????

Is the magnet stationary and the coil moving ?????

Is the coil stationary and the magnet moving ???????



All the best with it. I am interested to know how you can make any comment re the potential depth performance until you fix up the earth's magnetic field. I consider you have one large problem, not a small one, but again. all the best with it.

Thanks .... the detector is "very" sensitive to moving magnetic fields ... ie if the coil is moving it will detect the EMF ... if the coil is stationary it will detect a moving speaker magnet ( ferrite ... not particulary strong ) at just on 12 feet ... which I was quite impressed with ... because that would be a quite a small signal at the coil.

Even though the detector is responding to mag fields it is relatively easy to pick target responses ... the big plus is auto ground balance ... so what you gain on the swings you lose on the merrygoround LOL ... IMHO ... an earth field problem is much easier to solve than ground balance.

[UrbanFox]

Thanks .... the detector is "very" sensitive to moving magnetic fields ... ie if the coil is moving it will detect the EMF ... if the coil is stationary it will detect a moving speaker magnet ( ferrite ... not particulary strong ) at just on 12 feet ... which I was quite impressed with ... because that would be a quite a small signal at the coil.

When you have the coil stationary and a moving speaker magnet is sensed when 12 ft from the coil, but when the same magnet is stationary and the coil is moved you find the signal is no different whether the magnet is there or not, it is not that the coil is sensing the moving magnet, it is that the moving magnet is distorting the earth's magnetic field and the coil is within the distortion zone.

Trap for young players, Moodz.

[UrbanFox]

Moodz, some compulsory reading.......

http://www.finders.com.au/forum/viewtopic.php?p=61488

Moodz, another test for you....get your coil up in the air with the coil face vertical. Get a piece of 1 inch water pipe 4 ft long and swing it up and down with the pipe parallel to the coil face. Move further and further away while swinging the pipe up and down until the detector is barely responding. The moving pipe is disturbing the earth's field and the detector will sense this. With the pipe stationary at this distance and the coil moving the pipe is too far away to be sensed by the detector.