Delta Pulse

[jladre]

say us the ohm and inductance of your coil,and damping R, yes in max power is unstable so u should work more.regards
if shield coil i think get better results.

Coil is 560uH and 2.8 ohms.. dp is a little bit stable by now..my coil is already shielded too because im using a shielded cat5.

[mohandes]

Puting aluminum foil beneath the board connected to + side of battery doesnt have result to my board.

THE shield is ACTUAL only if you bring DP ON YOUR BODY (IN THE FIELD AT HUNTING). be cause static field is unfluating FROM YOUR BODY AT HOUSING AND THEN ON SENS
PART ON THE PREAMP. at table you will NOT see difference. read my posts MORE ATTENTIONALLY.

i shield all dp detector like you (connect to vref on board) and i shield all pots by wire then connect another shield place.
just for coil shielding can use graphite spray too?
regards

[kt315]

Puting aluminum foil beneath the board connected to + side of battery doesnt have result to my board.

THE shield is ACTUAL only if you bring DP ON YOUR BODY (IN THE FIELD AT HUNTING). be cause static field is unfluating FROM YOUR BODY AT HOUSING AND THEN ON SENS
PART ON THE PREAMP. at table you will NOT see difference. read my posts MORE ATTENTIONALLY.

[mohandes]

Hahaha..atlast i made my dp work better.. i can detect a 3.5cm coin at 40cm with 40cm coil made of cat5.. therefore i can say that DP is the most POWERFUL machine i ever build and also the MOST UNSTABLE of them all
Puting aluminum foil beneath the board connected to + side of battery doesnt have result to my board.

say us the ohm and inductance of your coil,and damping R, yes in max power is unstable so u should work more.regards
if shield coil i think get better results.

[jladre]

Hahaha..atlast i made my dp work better.. i can detect a 3.5cm coin at 40cm with 40cm coil made of cat5.. therefore i can say that DP is the most POWERFUL machine i ever build and also the MOST UNSTABLE of them all
Puting aluminum foil beneath the board connected to + side of battery doesnt have result to my board.

[kt315]

to work better DP will be not. every nails, every pins, every ferro and un-ferro garbage will be yours. only clear gold fields, without hot rocks and ferro, like you see them in Australia, without battles' and wars' metal, with gold nuggets everywhere will give you real mega extra advantages. anotherway you get only constant head pains (be cause your unwillingness to learn PI principles, be cause your nature laziness to learn something new).

[jladre]

Thanks kt315 for this statement, it give me motivation to continueworking my dp so that it may work better

[kt315]

DP with short FIRST STROBE DELAY.

Hi all.
I made 2 delta pulse with delay 5-80us, with unshielded coils 50,65 (1mm/18t),1x1m,2x2m,2x3m (R7=3.3K, C4=1.5nf, pot=50k, vcc=12v, I=120mA, 10000uF to irf, 1om/5w from irf to -vcc ).
I agree that delta pulse is a very good pulse detector for deep and big objects, BUT it is also a very-very good machine for small objects.
I also agree with Ivconic and Geo that if you have any other detector you have to seel them and with the money you take you build 10-20 delta pulse .
With 65cm coil i have sound from 55cm and with 50cm coil i have sound from 50cm for a coin of 0.5 euro (delay 5-30us) !!!
And with the same coil i have sound from 2.3m for 18liter olive oil box.
I have the same problem with wet soil when i use delays below 30us especialy last week who rains continiously.
I change my old battery 12v/1.2A with 3x6v/1,2A for 18v and inside i stabilize with 7812. Now i have a more stable machine but i take out the batteries to my back bag because the dp sounds when the batteries (metal) are near to 65cm coil. For stick i use wood 1.2m from broom.
My big problem over a year ! is that d.p. is not stable and it lose the sound 1-5hz requiret for sensitivity (threshold, capacitors problem ???). I change R42, remove R37... but the problem insist.
Anybody knows what can i do to have condinuously sound ???
I also want to know where you set the second delay in D3A and if this is correct R9+Rpot * C6 =ms (102-852ms).

Best regards to all and continue the good job.

[jladre]

i make all coil with cate5 or cate6.
for 1.2m coil i add 2wire like that and get 540mkh and 3.2ohm.good result .
but i make 1.45m coil with same cate6 and get 458mkh and 2.8ohm.but the same plate ,1.2 meter coil get better.
i use 560ohm for damping R for all coil.
regards

Hi mohandes! Have change c4, c5 and r7 of your board? Im a little upset of the result of my varios coil which have all bad depth.

[mohandes]

i make all coil with cate5 or cate6.
for 1.2m coil i add 2wire like that and get 540mkh and 3.2ohm.good result .
but i make 1.45m coil with same cate6 and get 458mkh and 2.8ohm.but the same plate ,1.2 meter coil get better.
i use 560ohm for damping R for all coil.
regards

[jladre]

Here is a table for 1mx1m coil, as the coil gets bigger the size of the wire gets bigger, but the number of turns reduces.

Thanks 6666... it is very useful for me.

[6666]

Here is a table for 1mx1m coil, as the coil gets bigger the size of the wire gets bigger, but the number of turns reduces.

[jladre]

hi
i use cate 5 and series he wires , i can detect 50*50 metal plate in 3.20 cm in air.
regards

Hi mohandes! For your 1.2x1.2 meter coil how many turn of cat 5 you use and what guage?

[jladre]

Test result of 1mh and 435uh coil no big difference what you got in 1mh coil are more wire, more weight and more effort in making...hahahaja.. you are right kt315...

[6666]

Thanks KT315 you have a good archive.