Delta Pulse

[mohandes]

hi greylourie, I checked with different values. 47 uF gives for me more clear reset, without retained sound. 33 uF is also, 22 is with retained sound. so 22-33 is at edge.
I could be change also R47 to 200-470k, but checked with 100k finding optimal C value.

hi
Merci . i want add 22mikro tantalum but which is the better , look the pic please , and i certain polarity right ?

i buy metal film res , i want replace R6 ( 1k ) by metal film res .


again thanks .
this is an idea :
can we add discrimination for Dp2 like PSG detector ? add 4053 and .... , it is possible ?

regards

[kt315]

hi greylourie, I checked with different values. 47 uF gives for me more clear reset, without retained sound. 33 uF is also, 22 is with retained sound. so 22-33 is at edge.
I could be change also R47 to 200-470k, but checked with 100k finding optimal C value.

[greylourie]

just checked my idea of autoreset... mod is working good. [ATTACH]28800[/ATTACH]

Hi kt315

Value of C is 47uF ?

Thanks.

[kt315]

just checked my idea of autoreset... mod is working good.

[kt315]

OK i should put the coil on 2-10cm and next adjust by GEB pot and reject ground effect.and i understand your means thanks .

I REPEAT. you have to do:
1. dig a hole in ground. put the brick in it.
2. tune DP on ground, do ground balance. as I wrote above - on clear ground, it means WITHOUT BRICKS, HOT ROCKS, ANY METAL in ground under coil.
3. do test on the brick in ground.

[kt315]

so , detect brick is natural ?

your testings are absoliutely wrong. do you see in my videos I keep a target, gold ring, in my hand?? NOT. your hand, your body is an antenna,
it accumulates electrostatic charge around everywhere, it explorers electromagnetic field everywhere from electric nets, some kinda re-translator.
so you get a testing with the influence, that is unhonest testing.

[mohandes]

videos I shared above I did without the caps on PCB. [ATTACH]28792[/ATTACH]

many thanks . OK i do wrong to set GEB pot .
OK i should put the coil on 2-10cm and next adjust by GEB pot and reject ground effect.and i understand your means thanks .

so , detect brick is natural ?or can reject it too ? or we should adjust DP like that you say me ?
excuse for my English.

i add all caps under pcb , but i add it like you , are you add 100n caps (C19 ,C20 , C23 and C24 ) on your board ?
i take photo and past here
regards

[kt315]

if possible for you certain these caps where add to PCB .

videos I shared above I did without the caps on PCB.

[kt315]

Hi KT one more small thing are the pots Lin or log or some of both I have all of them in both so its not a problem what type you suggest is better

Hi Calebsone, to my sorry bulgarians did not give a data on type of the pots. they gave only bare schamatic. thinking all pots have to be linear...

[kt315]

hi kt315 and guru
i don't success reject ground effect , by only GEB pot . i take video and send here .
for tantalum caps i parallel tree and next series to one cap ( like schematic but i add like your image now ) , and i think add wrong C19 ,C20 , C23 and C24 .
Excuse form my English in video

http://p30up.ir/images/7vphmysxfesq1o2rfbnt.rar

regards

if possible for you certain these caps where add to PCB .
[ATTACH]28787[/ATTACH]
regards

regarding your video... you did NOT the tuning at ground AT FIRST, because your coil hangs up in air, NOT ABOVE THE GROUND on distance 2-10 cm as in real hunting. so THAT IS YOUR BIG MISTAKE FULL NONUNDERSTANDING AND FULL FALLACY what is ground balance and for what. if DP is sensitive to hot rock so I had wrote what DP IS SENSITIVE REAL STATIC MODE MASHINE, it is NOT Hammerhead and not Surf PI low sens mashines -! DP is workind in REAL static self autotuning, advanced S.A.T.
tune on ground and DP cut out hot rocks, like you tune GB in VLF MACHINE GETTING UP THE COIL AND DOWN ABOVE THE GROUND on distance 2-10 cm, the sound does NOT raise and/or fall. if sound does NOT raise and fall THAT IS THE GROUND BALANCE DONE. that is WHAT I DID MEAN when I describe the GB tuning procedure -!

[Jose]

hi kt315 and guru
i don't success reject ground effect , by only GEB pot . i take video and send here .
for tantalum caps i parallel tree and next series to one cap ( like schematic but i add like your image now ) , and i think add wrong C19 ,C20 , C23 and C24 .
Excuse form my English in video

http://p30up.ir/images/7vphmysxfesq1o2rfbnt.rar

regards

if possible for you certain these caps where add to PCB .
[ATTACH]28787[/ATTACH]
regards

Mohandes friend
What most influences the ground effect, is the delay of the first sample (the first knob to the left)
Increase control delay, and reduce the gain slightly.
Thus, the detector will be less sensitive to the ground effect, but lose depth, will also be less sensitive to gold.
Hold the coil at 10 cm or more from the ground to lessen the effect.
It is a compromise solution.
The coil blindage, help slightly.
In the forum there is a lot of information on these issues, we must investigate with patience.
Regards, Jose

[mohandes]

Ground Effect

hi kt315 and guru
i don't success reject ground effect , by only GEB pot . i take video and send here .
for tantalum caps i parallel tree and next series to one cap ( like schematic but i add like your image now ) , and i think add wrong C19 ,C20 , C23 and C24 .
Excuse form my English in video

http://p30up.ir/images/7vphmysxfesq1o2rfbnt.rar

regards

if possible for you certain these caps where add to PCB .

regards

[calebsone]

Hi KT one more small thing are the pots Lin or log or some of both I have all of them in both so its not a problem what type you suggest is better

[kt315]

use 2,2, 4,7, 10 uF, etc. the value is not so important.

[mohandes]

hi, not on maximum. you have to choice intuitively a position of SECONDARY SAMPLE DELAY, like when you are tuning GEB in VLF detector, at first you switching it in ALL-METALL mode, then you take up and down a coil above and to a ground moving GEB pot. for every position of PRIMARY SAMPLE DELAY you have to find OPTIMAL SECONDARY SAMPLE DELAY position correspondingly. these tunings of both pots will assign the ground balance. for low value of PRIMARY SAMPLE DELAY you will have also low value SECONDARY PULSE DELAY, and hight for hight.

will give pics of the pin-pointer coil tomorrow because have not good lighten conditions now at night.

thanks
i try like your guide tomorrow . i hope i can adjust it by GEB pot .i add 22mikro tantal and test it too .
regards