Delta Pulse

[kt315]

very nice job Calebsone! anyone there had made the DP, wow... =) keeping the pics in special folder... thank you. waiting a video now... =)

many people wrote about how to retune DP on coins hunting via R7 and C5 decreasing... but not able to find those posts right now - geotech is not indexed in google, the moderator does not see that the forum engine was hacked.

[calebsone]

you know ill make a video this weekend i should have. it still has good range on coins and the silver bracelets i have been using over 30cm so far and i am still learning to set and use it. as far as the mods for coins im going to try to use sockes and test resistors last thing i want is to have to shield a coil because i already potted it.

[paku]

this is My DP can someone explain this board
im missing one BC546 what i can use for replacement

[calebsone]

BC237 BC238 BC547 BC548

[paku]

i have finish my DP but when i turn on my speaker silent
but i get sonic wave sound from my coil what its happen

[calebsone]

where did you get D8 D9 i had the same problem if they're not real like KT said then that happens they must be able to handle 150ma to 200ma just look at post #2730 on page 55. hope this helps it to work for you.

[paku]

what do you mean get ?
D8 D9
4066 and 555

[kt315]

yes, Salebsone. at first I look at markings of the 1N4148 (using 10x magnifying loupe) - if they are blur and spreaded I guess they are not original. if markings are clearcut, sharp, I set them in D8 D9 place.

[paku]

My DP Picture

[calebsone]

no paku the diodes in D8 D9 position on the schematic posted by KT like he said if they are not real they can't handle the 200ma max like real ones. i think thats whats wrong with your dp i had the same problem till i changed them. what schematic did you use your board is different ill look and tell you the numbers for yours.

[Hannu]

Same kind of thing happening here. IRF740, D8 and D9 burn when using motorcycle gel battery as power source. With 8 pcs of AA battery it is working. What should I do to fix this problem? increase coil resistance?

[porkluvr]

Is there any reason why two more 1N4001 could not be used, same as VD7? Those can handle up to 1 amp. They're slow, but so what?

[paku]

Is there any reason why two more 1N4001 could not be used, same as VD7? Those can handle up to 1 amp. They're slow, but so what?

can you explain a bit more bro

[calebsone]

Ok heres the video of the delta pulse I made iam not sure its fully set up and I still didnt mod it for small stuff but its still good.

[paku]

WOW i think it's john cena play the delta pulse heheheheh
how you figure it bro