Delta Pulse

[kt315]

hi, nowhere, no places. may be only a level on output of D6A is half of a source. if reference level is -E. mainly you have to use o-scope.
my opinion you do not get one side PCB smaller than turkish one side layout.

[RS_Phil]

Hi koko22! KT315 is right, In my DP?, I used the of Bulgarian PCB a six pot not seven, i think the problem of your DP is not the supply voltage of all IC but try to measure if the supply voltage is present, second check the surrounding components of NE556 and LF357 for bad components or loss contact and fault pcb trace, third follow KT315 advice use o-scope for signal tracing...

[ossamaussama]

To kt315 the smart man who modify delta pulse successfully , i have question

what is the best for gold detecting ( jar filled with golden coins ) delta pulse of TM808 2 BOX METAL detector ?

is that true delta pulse or PI machine is not sensitive to gold like VLF metal detector?

[kt315]

if you know where an jar filled golden coins you do not need in a metal detector. you need in good shovel. show me the place and I will find you the jar filled gold coins
without Delta Pulse.

[mohandes]

To kt315 the smart man who modify delta pulse successfully , i have question

what is the best for gold detecting ( jar filled with golden coins ) delta pulse of TM808 2 BOX METAL detector ?

is that true delta pulse or PI machine is not sensitive to gold like VLF metal detector?

i am trying to find this detector too , good depth good disc ,but yet not found
i am sure exist that detector we need but cannot find it, it is secret

[Ajay0707]

Dear Gurus,

I have constructed DP2 using the Turkish one sided PCB. Unfortunately it is not working as expected. The problem is... it makes lots of noises when kept in Auto tune mode ( I remember KT315 has posted a link of youtube video in which the DP makes all sorts of noises ( my detector is also behaving almost the similar way). But when kept in Manual mode it goes silent. No changes in reaction (silence) when the coil is connected or not connected. I am sure some of you could guess the reason for this behaviour.

My coil is 20 cm diameter .55mm enamel coated wire (.50 without enamel) 36 turns and 2.8 ohms.

[kt315]

try to choice another place and position of the coil in your room. I found only one place in my room DP does not give the noise - on window in vertical position suspended in middle of the window. DP is a clear non-motion very sensitive detector and any interference will give you a signal.

[Ajay0707]

Hi KT315,

It is great to see your reply. I will follow your advise and post the results here.

Thanks
Ajay...

[kt315]

any your suggestions on pots' type? what type you would like to use?

[kt315]

any one know about the max depth in soil by 1m*1m coil(more 3.5meters or no?)(maybe Mr kt315 know!!!)
regards

in water the depth is 5meter with 120cm*120cm coil, some one wrote here
http://www.md4u.ru/viewtopic.php?f=6&t=25&start=125

[g.s]

hello kt315..
studied briefly YOU pcb , I did not like the distance from the 556 pin 9 toward mosfet , considers it very far, this can be a disadvantage..
MY opinion, is the 556 As close as possible to mosfet a city with good shielding..

[kt315]

hi GS, I agree with you. but I only copy bulgarian design. it was been tested and working good. despite on long length of some traces DP is steady.

[kt315]

pot pattern with 5 mount holes as I present it like more universal for different types of pots.

[g.s]

ok after having you prefer BULGARIAN ok...
but before fine-tune the YOU pcb , it would be good to look at drive I showed you in previous post.. ??

[pigeon]

hi all

Does any one know why Jap is absent? I hope he's fine.