Delta Pulse - Take 2

[Sally]

Yes its changing by turning 20k depth. from 100-330 micro second. by changing C3 15nf-22nf it becomes 150-650 microseconds.

[surfdetector]

Sally,

Can you post a picture of your oscilloscope shot of T1?

[kt315]

is T3 width changing from 100-120 to 450-500us turning pot DEPTH? in edges positions of the pot

[Sally]

Thanks for the reply Kit315. I am fully aware that this DP is for big coils but I just read from other sub forum here of delta Pulse
and many enthusiast are building this machine. They are using small coil before upgrading to big search head. Just want only to
compare with the output of detection of my DP using small coil but it doesn't mean that it is my purpose.

I just check the time delay of T4 and the result is 8-32 micro seconds and T5 is 40-310 micro seconds. I am confused with the result
because the chart time delay that was posted here as a guide is T4=90-170 micro seconds and T5=160-900 micro seconds. Please let me know your thoughts.

Sally

[kt315]

hello Sally
million times i gave same answer (((

DP works with _long_FIRST DELAY. so from that following the issue -
small coil gives NOT the same result like PI schematic with short FIRST DELAY - we know them like Hammerhead, MPP, Bara, Surf
that working with 5...12us FIRST DELAY.

so... you must build different detector now... because DP is deeper, main frame which is a ramka coil 1x1 m (METER).

look typical standart metalhunting session to have a representation what is DELTA PULSE as the deeper.

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

дима спиридонов
5 years ago
на прошлой неделе таким глубинником подняли 17 бойцов 326 стр.гв. дв в Калужской обл.Зацепили за каски.
Dima Spiridonov

Last week, 17 fighters of the 326th division were raised up from by such deeper.
in the Kaluga region. Hooked on helmets.

pleasure

[Sally]

Hello Kit315, I did a test on the DP and this is the result: 2.5cm coin = 10cm, coke can made of aluminum 330ml = 30cm detection.
I used 28 cm. coil,#25awg (.45mm) copper wire with inductance of 425 micro henry. For me the result are far behind from others who made this project here.

I did not change anything since i want to follow the schematic you provided and wait for your advice.

Regards,
Sally

[kt315]

Dear Anatloy,

I almost done putting all the components on the PCB board. Since I am a beginner and not familiar with this project, I would like to ask few question? 1. What is the test procedure and calibration of this circuit board? 2. Do i need to check the test point using oscilloscope before putting the Mosfet and diode on the circuit board or I need to put all components before before doing the calibrations? Please kindly provide calibration steps. Thank you.


Sincrely Yours,

S/L

ok. FIRST AT ALL, Take 2 LOL!

1. NO TEST PROCEDURE. DP is not needed in test. THIS IS SIMPLEST AND EFFECTIVE device.
you need to tune 100 Hz, or 120. points T2 and T3. that's depending on your there ELECTRIC NET STANDART. we call it 'the AC voltage in my room power sockets'.
we have here 50 Hz and i set 100 Hz.
US has 60 Hz and an american amigo must set 120 Hz.

is it clear?

2. desirable, you need check all logic levels in test points according the signal diagram. also check the voltage levels too.
3. whole calibration steps manual is unaccessabble because DP is stolen product, DIY product.

pleasure

[kt315]

took pics from this link http://www.vesturesklubs.lv/forum/4-1461-1

[ZOUjiarui]

[ATTACH]53896[/ATTACH]
DP?Has anyone ever made this? What's the actual effect? Do you have any pictures about it?

Hello.

[ZOUjiarui]

Sorry, I misquoted the previous article.

[ZOUjiarui]

Here is the original

Hello.

[ZOUjiarui]

Who is the author of it? I had purchased its motherboard, but I lost it, I did not try. I have it laid out.

[kt315]

first of all you have to do begin soldering a board to set just the sound part
and check the sound. then you will sure know this part is ok.

https://www.youtube.com/watch?v=ODtvLeWdre0

[sunita.pradhan]

Thanks Vadim18 for your reply. I think you are right !!! I will follow your advice..

[Vadim18]

Can we use voltage dividers (using resistors) across 12v power supplies +ve &-ve to supply power (6 v) to an additional LM386 amplifier circuit on delta pulse.
If yes where should we place these resistors ?
Sorry !! i have a very little knowledge on electronics..

This is really bad idea, don't use any audio amplifier with DP. Why you need additional amplifier? Maybe your speaker is bad or it connected without capacitor (in series with speaker), or capacitor connected with wrong polarity.
I use tiny speaker from PC, and i even taped it with paper scotch when i do tests on table, otherwise sounds to loud.