Delta Pulse - Take 2

[kt315]

PCB file. you need just to trace it and you will get the pcb. you do not go full way from a schematic, you do right just the pcb.

[kt315]

amigos, say hello to new member!

I am Geotech under zavila you did say you gona pass some filesBut p cad viewer can do nothing with no files lol.As i said i am like to finish this delta pulse project so i can go metal hunting , i am not looking to reproduce or sell I am new in eletronics and learning .Could you let me kno please and could you explain how to tune the ressistor if in need some one to show me . Thanks again

[AK48]

Sorry , i like ...

[kt315]

last actions before the shipment. must do a video.@AK48 #AK48

[Tanu]

Delta pulse 2
coil 40 cm

Hello
how to make this coil housing

[star]

Delta pulse 2

[star]

Delta pulse 2
coil 40 cm

[Emersonpaz]

I thought the distance was good considering the size of the coil 26cm.
Test small coil Delta pulse:

https://youtu.be/JGPush6MUME?si=eIHUo_kbW8pkjP6u

[kt315]

Has anyone else tested the 10k resistor between the gate and source of the VT1?

checked and forget. you will get nothing. if you want the depth just turn the pot POWER clockwise. seems you began try "to squeeze juice from dry lemon" that do every geotecher long before you...
i had see that billion times here... you just waste the time.

[Emersonpaz]

My layout is different, I copied it from another board 126 x96 mm .

[Emersonpaz]

measure R8. your value is wrong.

No, it's not wrong. 27k next to capacitor 4n7 see the colors. my delta operates at 300hz TX POWER 250uS VT1 heated up.
I did a test today I used a 10k resistor between gate and source VT1 I use (K2545) Toshiba works cold without losing detection range. I used the tips in this attached pdf. Has anyone else tested the 10k resistor between the gate and source of the VT1?

[kt315]

decrease R7 to 5-6 K if you so need gold ring. decrease FIRST DELAY WIDTH.

[kt315]

measure R8. your value is wrong.

[Emersonpaz]

I used the CD4538BE I just changed C5 1n5 to 4n7 and had T4 and T5 samples with 41us now it detects a gold ring before with 15us it was not possible to detect a small gold ring.

[eduardo1979]

the HEF4538BP is the best option. I also used them when I did the Delta Pulse and everything worked correctly for me.