RELIC HAWK

[nakky]

Hi Max,you no but I don't no ,suggestion TLC27M7 or TLC 3702 are use in ML SOV ?Grt Nakky.

[eclipse]

. If the person or Person's that made that Relic Hawk schematic that we found floating on the internet would have done the work here on Geotech from the beginning , it would not have all those error's !!! And also the person or person's who developed the Coin-Seeker 2 , if he or they worked on it here also "from the beginning" It would be Near Perfect !!!! The Relic Hawk circuit is going to work better than the original !!! .........Eugene

Contributing people here are just a few people, we know who they are.
People who just read and take ideas without giving something to the forum - alot. Coinseeker was a commercial project, never intended to sell in lots.. just a few units to see how it's handling bulgarian soils, etc. Seems that RH/Musketeer are the best working devices here, among the other top-used devices XLT,SD2200,GP3000,Explorer; the only one not having microcontroller among all...

Not to be confused with the author of CS2 pro, I was friend of the author, he doesn't know english that good, i don't think it would be much of a help for him posting in the internet

[amtech2005]

RELIC HAWK

Thanks again for all the work that is being done on the "Relic Hawk" Project !!! The "Electronic Theory" , the "Circuit Simulations" , the "PCB/Board" designing , and this whole Relic Hawk "thread" , which is a Work-In-Progress . You can not find this anywhere else, a Book or on the internet !!! A few other Detector forums that are in foreign languages come close , but the electronic theory and Education does not compare to Geotech !!! Not yet anyway . If the person or Person's that made that Relic Hawk schematic that we found floating on the internet would have done the work here on Geotech from the beginning , it would not have all those error's !!! And also the person or person's who developed the Coin-Seeker 2 , if he or they worked on it here also "from the beginning" It would be Near Perfect !!!! The Relic Hawk circuit is going to work better than the original !!! .........Eugene

[Max]

It WILL eventually work,it´s just a matter of time and all the fun we have untill then..
The problem is that i am waiting for parts so Max is alone testing the board, with no way to compare results etc.
Max, could it be the LM393 that is not the right one?
Wish i could help ...

Regards,

Hi Fred,
playing with coil I found positions that give similar behaviour... so I think it's probably due to eccessive voltage at preamp inputs that make device unstable when all TS27M2 are present.

If I change the U8 and use ne5532 the behaviour become much more stable... and in well nulled position all periodic beeps vanish, so it works.

Is about residial voltage at coil... and noise level at inputs of op amps I think.

Big problem is that still disc mode fails: reduced detection and no effective disc... but I do not understand that, pcb seems ok, no other mistakes found... maybe some mistakes in schematic ?

If you look at comparators before BC517 in first schematic (bulgarian one) you'll see pretty different connections of comparators...

Kind regards,
Max

[Fred]

It WILL eventually work,it´s just a matter of time and all the fun we have untill then..
The problem is that i am waiting for parts so Max is alone testing the board, with no way to compare results etc.
Max, could it be the LM393 that is not the right one?
Wish i could help ...

Regards,

[eclipse]

coinseeker works just opposite of that - all metal mode sux, in disc works better. but you still need the device itself, suppose that the schematic is not 100% correct, you maybe will have the schematic working at some time but it won't the same..
Cheers

[Max]

Guys am i missing something here?
What you are trying to do is reverse engineer Rh pcb without having the board for real?! Haven't you think about the interconnections under all those nice IC, big capacitors etc..? Sounds like more imaginary work that it should be, if you are looking to achieve success offcourse.

Hi,
no , we got a schematic from somewhere... maybe wonderland.ru ...and then Fred made the PCB... so the problem is understanding now if there are errors in PCB or in schematic that make it works odd.

In All-metal it works average...26cm on air for 1eur coin with 11'' DD coil... but big troubles are when in disc mode!

It's all imaginary work here... apart sometimes stuff works at the end.

Kind regards,
Max

[eclipse]

Guys am i missing something here?
What you are trying to do is reverse engineer Rh pcb without having the board for real?! Haven't you think about the interconnections under all those nice IC, big capacitors etc..? Sounds like more imaginary work that it should be, if you are looking to achieve success offcourse.

[Max]

Hi,
I think I've solved the puzzle of self-oscillations in disc mode: I was using all TS27M2 at that time... and got troubles... I changed U8 with an NE5532A and now the beeps vanished...kind of magic I was thinking!

But then in disc mode still works bad, lower detection range and doesn't disc properly, even swapping rx coil leads...

Dang stuff... you solve one and find there are others waiting...!

Any idea ?

Kind regards,
Max

[ivconic]

Yes...could be wire from 0.26 to 0.28mm....
Now need to find that wire gauge...
Most important is that i just measured again inductances on original coil; those are as noted on schematic: 1uH(TX) and 15 uH(RX).Coil is as posted 35mm, outer diammeter.
"D" shape from original coil, converted to circle gives exactly 30cm diammeter. So....there are enough elements in our "quotation" to conclude the rest and succesfully make proper coil.
Regards!

[Max]

Hi,
so on that is 0.65mm! But probably wire is thicker there than in RH coil.

Sure ML like big wires...

Kind regards,
Max

[nakky]

[nakky]

[nakky]

[nakky]

Hi Max,this is ml sov coil.