4-7 meter detctor

[Max]

I don't know...

some are/seems older than others... not that's indicating which is the first one.

As with other designs... when something works... suddenly people from same or other country clone that stuff...

we see that everyday.

Today is an accepted fact... though there are still copyright and patent issues worldwide... that it's easy and cheap manifacturing stuff in countries like today China, and tolerate they will copy/clone devices and schematics.

Happened with so many things! That's and enstablished rule now... for many companies to tolerate that approach cause they can produce things for just a small fraction of what they had to spend in Europe or US/Canada or Japan.

Some companies, instead, like to do all in house... usually those companies sell stuff at higher prices and have really strict quality control chain.
Also, the divide et impera approach still works... so can make e.g. just pcb in a place... then assembly/tune stuff in house and the like.

Anyway, bulk production of cheap stuff is usually a target for cloners worldwide... that's why we have all that dang chinese MDs on the market for just 30eurs or something.

The XR-71 cloning is old stuff... maybe started as low end production in eastern countries of western made thing, but who can say for sure ?
Just original designer and people who cloned stuff I think.

Kind regards,
Max

[ivconic]

Hard to say. Yet i would like to know Delta Pulse (XR71) origin, since i made several handmades already. Would be nice to see how all that started.

[mmlove2007]

hi friends

are you the gpr system is 3-7 meter serched???

pleas uplode digital gpr system is a full shematic & pcb in to site
and discrimiator for gold -silver
thank you

[peroon]

hi friends

are you the gpr system is 3-7 meter serched???

pleas uplode digital gpr system is a full shematic & pcb in to site
and discrimiator for gold -silver
thank you

mmlouve are you what as there if? If ther gpr or gprs there is if? If not than yes! If yes than not! most deep gprs is deep 2 box tx. So if you there not than soft not is where do?
Than you ver moch!

[Fred]

Yes you are right Peroon,
I am to box if deep.
please semati too but only 7metr

[mmlove2007]

yes fred

ican digital system gpr cicuit for make isa 7meter searched (pic magnumeter)

thanvk you

[Max]

yes fred

ican digital system gpr cicuit for make isa 7meter searched (pic magnumeter)

thanvk you

I think you're allergic to spelling-checkers...

Kund reguardes,
Max

[skynet]

xr71 do you have the circuit diagram?

[kt315]

xr71 do you have the circuit diagram?

circuit

[Koala]

xr71 do you have the circuit diagram?

A lot of information here Delta Pulse = xr71

[mohandes]

i think all guru here and more EXPERIENCE for the detectors.
and i want say one guru ELUCIDATE to me about the real depth for the detectors.
i need good detector that can search on near 7meter and have discrimination or just find the gold or Nonferrous ,
i called by my gurus friend and all say me 2Box is good but not have disc.
so any guru have a best for all or...

please say me and put here schematics

in this forum 2box exist ?
regards

[kt315]

2-box has disc mode. i mean TM-808 and TF900 (recalled). in disc mode the their depth is very low.

[Davor]

I believe it can be remedied, and most of our VLF projects could be "convinced" to act as discriminating 2-box. What may be needed is a somewhat different Rx preamp/isolation head that would be supplied with it's own batteries, and some serious isolation mechanism, say optical.

[mohandes]

I believe it can be remedied, and most of our VLF projects could be "convinced" to act as discriminating 2-box. What may be needed is a somewhat different Rx preamp/isolation head that would be supplied with it's own batteries, and some serious isolation mechanism, say optical.

thanks kt315 and Davor
i want ask you ,about DD coil.
i finish it but can not adjust to 0volt in ne5534-6 ,for IDX?why?(minimum 1.3 volts)
and i make DP2 better or 2Box?
regards

[kt315]

I had told you to isolate the windings' shields in touching places. you refused. if you refuse all time all people's suggestions then why you ask again and again and again on same matter?