RELIC HAWK

[aft_72005]

Hi Eugene52
Downloaded from MD4U, it was uploaded by veltex there. I don’t know it is correct
But I study little and compare it with corrected circuit by Max. Some part seem
As like together .
Best regards.

[Unregistered]

Connection R1-R3=mistaken.

[Max]

Connection R1-R3=mistaken.

Hi,
yes, but which is mistaken ? In which schematic ?

Also, the resistor (R12 in russian schematic) that is in parallel to 1nF at NE5534 is 1K in russian and 15K in old schematic...

Kind regards,
Max

[Unregistered]

in russian schematic-aft_72005-Downloaded from MD4U

[Eugene52]

RELIC HAWK

It would be nice if Veltex could post perfect and clear PCB circuit board photos of the Relic Hawk !!! If not , then Veltex work is only better "Art Work" of Max's / Fred's / and a few others "weeks of schematic and circuit work"........... I did not see oscilloscope test points or field tests from Veltex !!! But his schematic looks nice , I thank him for that !!!...............Regards..............Eugene

[N@SKO]

I have need of audio stage shematic by Musketeer pls
I think that RH audio stage is wrong or some elemet mising!

[Eugene52]

RELIC HAWK

I have need of audio stage shematic by Musketeer pls
I think that RH audio stage is wrong or some elemet mising!

Hello N@SKO , I have not seen a Musketeer schematic on Geotech or any other forum . But if you search hard , you will find a crystal clear digital quality photo of the Musketeer PCB circuit board . And you will see your audio section in question . I saw the photo about 1 year ago , and I am searching again to find it for you . So , If there is a public schematic , it is being kept very private . And Yes , the Relic Hawk project will be re-started very soon and all errors will be corrected . If you find a musketeer schematic check back and let us know !! I heard that the Relic Hawk and Musketeer are very , very similar in design .............Regards............Eugene

[ivconic]

Ok, so i made it using last SL files and Max's last schematic.
Original coil is attached and it is working...but very erratically. Frequency is 4.994 kHz. TX output is 16vpp. Power drain is 52mA.
When i adjust GEB trimmer on pcb to make it silent it stays silent until move coin over coil. Than detection occurs with pleasant RH tone. But it continues with "peep,peep,peep..." even when coin is removed. So i need to do again something to make it silent. Detection on 1e is more than good, over 45cm in air. Disc circuitry seems to work fine cose it is not reacting on large iron at all. Turning trimmers and pots i get the point where it can detect iron also. I was amazed when it detected small iron claws at more than 80cm in the air.
My handmade is just finished, i am very exhausted. It is not checked totally and adjusted well at all.
To tell you the truth i am not quite sure how to adjust those 3 trimmers on pcb? Turned it fully and havent noticed any change in behaviour!?
Also Sense pot is not changing anything. Only 4th trimmer on pcb - GEB is making some differences and also Disc pot too.
So...
I guess it is possible some small mistake made by me or pcb designer so it wont work properly. I respected all the original components values.
I am very interested in your work Max? Is your device calm? What happens when you close coin to coil and than remove away?
Any special spots i have to pay attention on, on pcb? It is rather complex pcb and schematic too, some changes were made (i presume) so i can use some help here for sure.
Waiting your replies, i will be online in the evening.
Best regards!

[ivconic]

Oh ...btw, instead 27M2's i put TLC272's there - only diference.
Transistors are BC337 and BC327, at audio i put MPSA13. Small (at audio) transformer i made and it is 14.3mH. At RX input i put small 1mH choke (resistor look-like).
So...what else...?
I will continue later..

Just to remind you more;
original coil is DD 39cm diammeter. TX is approx. 3.1 ohms and RX approx 38 ohms (maybe i am wrong a bit i forgot original measurements, but i can measure again tonight, if it does matter). TX is 1mH and RX iz 15mH.

[tiktak]

Hi

Hi,
Ivconic.
I am glad that you are finaly here.On this thread.
You now that Max wont be here for a while.I still havent build my PCB.
Have other problems now.But if you read back you will see that Max made it work very calm!
Did you put those 100N comp. caps on all ICs?
Also GEB should be multiturn you now this.
And also some ICs changing gived good results.Check it.

[nakky]

Ivconic,nice to see you work on Relic Hawk . I hope you can find mistake and make it work properly . Grt Nakky.

[ivconic]

Hi,
Ivconic.
I am glad that you are finaly here.On this thread.
You now that Max wont be here for a while.I still havent build my PCB.
Have other problems now.But if you read back you will see that Max made it work very calm!
Did you put those 100N comp. caps on all ICs?
Also GEB should be multiturn you now this.
And also some ICs changing gived good results.Check it.

No, i didnt knew Max is absent!? I am not ..kind a "up to date" with latest posts here so really i didnt knew.
No.. i didnt put those. I dont think those will solve the problem.
Yes manual GEB could be mutliturn, but i didnt used it by now. I am using only trimmer on pcb, switched to automatic gb.
What ic's more to change? I think this is most closest to original, no need to change ic's any more.
Ok...i will have to read whole this thread again, from very start.

Regards Tiktak and Nakky, and thanks...
Ok i am here....we will discuss this more...

[ivconic]

1 micro (1uH) it is. It work both ways on board or inside the coil. If it is on your pcb you can adjust the phase shift the way ivconic does - with small pieces of metal inside the coil.

Old post..but now i spoted it.
Not true Eclipse! Way out of real situation.
Once i just told a story of simillar case. I put some Al chunks in coil and observed phase behavior. It was only in experimental purposes. Than and never again!
I never left anything metalic in the finished coil so far. I think that would be huge nonsence!
So you missunderstood my point than. I must say this to prevent any further missunderstandings!

[tiktak]

HI,

Hi,
Ivica.
Yes those 100n make a whole thing a lot more stable.And that is your probleme.I remember this moment.
And also I think that some TL27... were changed with ne5534??But not shore for this.Its in thread.I have no time now to rewread it.
I hope we busted it soon.Its hell of device!

[ivconic]

What bugs me is fact that there are not those capacitors on original RH...? So...
Ok...NE5532 could be used at some places, but i dont see why it is better than TLC272?
I guess i must wait Max to return here....