Delta Pulse

[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.

[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.

[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]

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

[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]

for adjust LCD ,i cant set best point for discrimination .how i do this .i see turkey video but in final set by copper and iron i dont understand please help;
by 18f252 my means.

[mohandes]

when i connect coil LCD response very bad for adjust but without coil well.so is ok?
battery adjust well and next CW TR1 to see full (i see it next push zero) but when i ccw TR1 don't show full to set it, how can i adjust.
please any one help
i wait.
regards

[jladre]

Got problem on 1x1m coil.. when i plug 1x1meter coil 6ohms, 385uh to the dp the sounds from the speaker become weak and even any adjustment of the pots i cannot get detection.. dp works well in smaller coil. What would be the problem?

[kt315]

ANY experiments with big coil in the room will end in unsuccess. be cause you have huge amount of EMF influence and metal armature around you.
I wrote about this many times but people again and again try check DP with 1x1m coil in the kitchen.

[jladre]

ANY experiments with big coil in the room will end in unsuccess. be cause you have huge amount of EMF influence and metal armature around you.
I wrote about this many times but people again and again try check DP with 1x1m coil in the kitchen.

Tnx kt315...peace... i try to test it in the garden tommorow..

[seadoggy]

LF357 can substitute with TL071???
regards

[kt315]

not. TOO LOW SPEED.
all substitute HERE in Bill of The Material.
DP_part_list.txt

[kt315]

Wow That's the first time I have heard that. I though higher inductance was used
for big objects or deep detection (like 1mx1m coils). You would miss small objects
as the higher inductance has greater resistance to change so needs to be pulsed
slower....

Eric Foster: My Beachscan uses a coil of 1mH as does the C.Scope CS7 and CS6PI.

[kt315]

some pics not mine DP with big coil

[kt315]