Wanted "ADMIRAL"

[bonchev2]

Hi getsa, is look you got advice from a old friend I see it and is work perfectly. Greetings!!!

[getsa]

At first glance everithing seem ok, instead the signal on tl072_pin1. There you should have pure sine wave.
Besides - what the signals on pins 4 and 15 /4053 look like? See what I mean on the schematic - TP1 and TP2.
Do you have a constant tone with the threshold potentiometer turned to maximum? - it depends on 100k trim setting.
My version of the board I'm currently playing with is different, but this is for experimentation...

[Deghbar613]

Hello Deghbar613,
I have made the original Admiral (scematic and pcb posted here), as well as variations of the pcb, but the rsults are the same - the quality of the device depends only on the quality of the components used (the ICs and capacitors), and the quality and the right point of ballance of the search head. Also, I am experimenting with the components` values, trying to achieve smoother threshold and testing the behaviour of the device, tinkering it little bit constantly, but the results aren`t significantly better in general.
Have you already repeated the scheme and if so - what specific difficulties did you encounter, so to give you specific advice on its revival and adjustment?
Regards

THX FOR REPLY GESTA
this some information
Regards
this is my pcb

tx


tl072_pin1 (can't naill it more than that)

cd4053_pin10

cd4053_pin9

tx_data

rx_data

[getsa]

Hello Deghbar613,
I have made the original Admiral (scematic and pcb posted here), as well as variations of the pcb, but the rsults are the same - the quality of the device depends only on the quality of the components used (the ICs and capacitors), and the quality and the right point of ballance of the search head. Also, I am experimenting with the components` values, trying to achieve smoother threshold and testing the behaviour of the device, tinkering it little bit constantly, but the results aren`t significantly better in general.
Have you already repeated the scheme and if so - what specific difficulties did you encounter, so to give you specific advice on its revival and adjustment?
Regards

[Deghbar613]

... and here's how my latest PCB works - outside the workshop:

https://www.youtube.com/watch?v=ob1nYn2LGC8

Everithing is still very "raw", but for now I'm happy with the result...

Cheers!

hello gesta and guru
All my attempts are in vain
please share with us your pcb and data maybe some Tips from your experiences
thx

[CEBRAIL]

httpshttps://youtu.be/qd9Am9hMmeQ?si=jScmYNJGBA4t6PE4

[CEBRAIL]

Admiral Quasarhttps://youtu.be/qd9Am9hMmeQ?si=jScmYNJGBA4t6PE4

[CEBRAIL]

Admiral Quasarhttps://youtu.be/qd9Am9hMmeQ?si=jScmYNJGBA4t6PE4

[getsa]

Congratulations on another success!

Suounds curious, regarding the coil optimization...?

Interest remains high - keep going!

Greetings!

[bonchev2]

SMD is more stable. I like it. I have Ideas to change a search coils data a bit. Greetings!!!

[bonchev2]

[getsa]

Well done!
It will be interesting to share your impressions after testing that version outdoors, on a real terrain, compared to the DIP version.
Cheers!

[bonchev2]

[Sarkim]

~ 84x87 cm.

Thanks brother
I see your reply to me, apologies I was busy didn't check notification

[bonchev2]

Mine is 83x83 mm. but now I made smd version with is 99x78 mm with potentiometers on it for more stable work but is not tested yet. I will posted when is done.