RELIC HAWK

[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]

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

[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,

[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

[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

[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

[nakky]

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

[Max]

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

Hi,
I've took a look at SD2000 these days... and seems to me there's similar philosophy there (though schematics is different and more complex). ML uses very good stuff inside MDs like the LT1057 and TS27M7 , nice ics along with NE5534 front end... very common on PIs too. Now... in SD2000 there's no MCU, at least I can't see in schematic made by Vladimir and posted by KT315.

Just 4093s... other gates... easy... complex cause of some redoundancy and unusual components but not about logic.

I cannot recall if RH beat SD2000 on depth but is probably this way on average soil!

Not cause SD2000 it's bad, I think is very nice designed machine... but maybe some solutions tend to overcomplicate stuff... and avoid cloning by mass producers... not only to gain something about depth or stability.

Kind regards,
Max

[Max]

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

Hi,
I don't know... I haven't sov schematic. 27m7 is dual precision op amp... the tlc3702 is dual comparator, probably both are present in it.

I clearly see the ne5534 smt inside the coil you posted... would be nice making the coil that way... and avoiding long wires between coil and preamp...

Kind regards,
Max

[Fred]

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

Hi Max,
wich schematic is that? i only know the one we used here.
Did you use the BC 517 at oscillator?

Regards,
Fred.

[tiktak]

HI,

Hi,
Fred look at the first page of the treat!And Ivconics site there is all the info about Coinseecer.Realy different disition.But its just maked to work.Not the original RH.And we are trying to make the original RH!

Eclipse=stelian bourgas waiting for a new info for new coinseecer?
We now that wont help even oposite make some frustrations here AGAIN.

Eugene-we can learn how live from ML's history and it wont be enough.Be wise.Have you ever experianse XLT or GP?40 cm denar and you can lift the coil 10-15 cm and the signall is still strong and clear!We are close to clone RH thanks to MAX and freds PCB but we are still very far from advanced version of RH which is 1998 model!SO......................

[tiktak]

Hi,

Hi,
Ivconic.How are you.Did you recover?
I wanna ask you did your RH had speaker or this device works only with phones?
Thanks
p.s.I am glad that you are back here,so I wont post again because of your will.

[Qiaozhi]

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

Hi Max,

Have you checked whereabouts the DISC channel is sampling on the RX signal?
Also, is the GEB channel sampling at the zero-crossing point?
If not, then the phasing on the coil is probably incorrect.

[ivconic]

TikTak thanks,
original RH does not have speaker, only earphones.

Quiaozhi i was thinking the same way, only didnt want to bug to much; most of my doubts are on coil Max used there.
My problem right now is due i dont have proper wire gauge to perfom detailed experiments and finally establish most accurate datas for RH coil. But i am pretty close.
Need to keep resistance arround 40 ohms for RX and inductance 15uH on 30cm former.
I guess TX part would be much easier to distinguish and make.
Actually piece of cake. Only 35 windings on 30cm former must give 3.1 ohms and 1uH inductance. So....0.5 to 0.6mm would do the job just fine.
At the end only one thing left; proper residual voltage?
Also easy job. I intend to make only TX part on perfboard, connect to original coil and measure residual voltage at RX outputs.
Must obey 5kHz frequency for proper readings.
Once we get proper datas, it would be even easier to calculate smaller diammeter coil - my preferables! Yup!
As original 35cm is a way to large for my taste. I intend to make 24cm coil for RH.
MAX...come to think....how about LS204 opamps? Obsolete, but i have few in my scrapbox.
Regards!

[Max]

Hi Max,
wich schematic is that? i only know the one we used here.
Did you use the BC 517 at oscillator?

Regards,
Fred.

Hi,
I mean the one on page #1 of this thread, labeled "relic hawk 1".

No , I changed for BC337, BC327 at osc, they work good.

The BC517 is instead of darlington BSR51 at audio stuff, not labeled in schematic.

Kind regards,
Max