Wanted "ADMIRAL"

[Zotchin]

Good

[Zotchin]

bonchev2
I do the same like you but I can't measure less than this one in rx preamp .
I try 27k instead 15k resistance it drops to 1.6vpp but not good sin wave. what can you say?
I see one of your video that you get about 0.300vpp I try but nothing.

[bonchev2]

What searching coil are you using? I guess it's not nulling properly. place a coin on top of searching coil and shifted until you have what nulling you want. Other problem can be coils shield as well. Return 15k resistor the problem is nor from him

[Zotchin]

What searching coil are you using? I guess it's not nulling properly. place a coin on top of searching coil and shifted until you have what nulling you want. Other problem can be coils shield as well. Return 15k resistor the problem is nor from him

OK I will try again

[Zotchin]

What searching coil are you using? I guess it's not nulling properly. place a coin on top of searching coil and shifted until you have what nulling you want. Other problem can be coils shield as well. Return 15k resistor the problem is nor from him

Nothing
Can you tell me where did you attach the minus of the both coils

[bonchev2]

On minus on PCB but more important is how you connect the shield of the coils. I guest that is the problem. Better got to my Youtube channel I have a lot videos about Admiral

[Zotchin]

On minus on PCB but more important is how you connect the shield of the coils. I guest that is the problem. Better got to my Youtube channel I have a lot videos about Admiral

I don't know how but I get the lowest mesurment less than 0.200vpp .
I soldr wires in their places I don't use the line form pin 1 of 1458 it's not working with me and I connect the shild of rx with (-) tx that's it
Iam confused!
Yes I bend the both DD little bit the straight side.

[getsa]

Let's shake up the section a bit...
https://www.youtube.com/watch?v=XkRSWN4gh0w

[markantony]

Hello enthusiasts. I offer you my experience in the manufacture of Admiral. I got the boards from my colleague Bonchev2, very good workmanship. Pro correct installation work without problems. Tx -60 (0.40mm), Rx -140 (0.25mm). C tx - 220 nf. 7.5 khz. For C-Tx, use for voltage 160. On the generator I used R -24 ohms. Make sure the sine wave is stable. Instead of LM324, I used - TS 274, it works better. For the receiver, I used - TS 272. It turned out with very good depth, and discrimination. This from me...https://youtu.be/oD2JilWuO_U

[bonchev2]

Good job Mark, the device work perfect and yes can be experiment with this detector a lot. Greetings!!!

[markantony]

Hello enthusiasts. I offer you my experience in the manufacture of Admiral. I got the boards from my colleague Bonchev2, very good workmanship. Pro correct installation work without problems. Tx -60 (0.40mm), Rx -140 (0.25mm). C tx - 220 nf. 7.5 khz. For C-Tx, use for voltage 160. On the generator I used R -24 ohms. Make sure the sine wave is stable. Instead of LM324, I used - TS 274, it works better. For the receiver, I used - TS 272. It turned out with very good depth, and discrimination. This from me...https://youtu.be/oD2JilWuO_U

The metal detector is now ready.https://youtu.be/KFE0NMnXCnM

[getsa]

Hi guys,
For the experiment - try what happens when R31 (39k) is removed...
This resistor do the threshold smoother, but the last few centimeters are heard weaker... (as if the last 2-3 sm in depth are lost...)
Removing it, the target can be still be heard with a loud sound at the farthest possible distance, but the device become more nervous, and some additional measures need to be undertake to calmed it down...
Try it and share your experience and opinion...
Greetings!

[h9361]

[ATTACH]58122[/ATTACH][ATTACH]58123[/ATTACH]

Thank you dear Emersonpaz
Has anyone tested this version yet?

[CEBRAIL]

Hello all
You heard about the earthquakes in turkey and cebrail is from there.
Is he okay?

Thank you, I'm fine. We had a disaster in Debre, thank God, I'm fine.

[CEBRAIL]

R45 39k resistance is required to see gold clearly under 39k bricks and granite rocks and to prevent the device from losing depth in the soil.