gold gun al707 or 718

[takhslambos]

is some one own a gold gun(the original one from acurate locators) to tell me he ever found a non ferous metal from a distanse??!!!!thanks!!!!

[Geo]

Last weeks i own the AL707 but i had not success:frown:.

[Geo]

Here is my modified AL707.
It has many differences between AL707 but the working principle remains the same.
Enjoy it...:)

[WM6]

Excellent design Geo. Congratulations.

What is on display: frequency or signal?

[Geo]

Excellent design Geo. Congratulations.

What is on display: frequency or signal?

Hi.
It is signal.
At photo displays the background signal. When it detects metal then the display reads between 400 and 1500.

:)

[detectoman]

bro, geo, jaja excelent inovations! may be drtech should look these

[Qiaozhi]

Here is my modified AL707.
It has many differences between AL707 but the working principle remains the same.
Enjoy it...:)
But the big question is, "Does it detect treasure?.

[takhslambos]

Hi.
It is signal.
At photo displays the background signal. When it detects metal then the display reads between 400 and 1500.

:)

Is the same with gold gun al707 the redings edicator i meen betwen 400 and 1500 saw when is detect any metal...

[Geo]

But the big question is, "Does it detect treasure?.

If the object is big and inside the ground then the answer is Yes.
For coins.... i don't think :???:.

[Geo]

Is the same with gold gun al707 the redings edicator i meen betwen 400 and 1500 saw when is detect any metal...

There are many differences between Geogun and Goldgun.

[nelson]

Does it need a Tx to work?

Regards
Nelson


If the object is big and inside the ground then the answer is Yes.
For coins.... i don't think :???:.

[takhslambos]

There are many differences between Geogun and Goldgun.

Can you tell me if you test the geogun and the gold gun al 707 to same target?is both lrl detect the target? Or not...

[Geo]

I tested both at the same target the same time many times.
I never had signal more than 70mv with gold gun so it had not ability to work.
Only one time at a mountain took high signal but there was nothing near it.
With geogun i have signal all the times.
Μιλαμε για αλλη κατασταση....:cool:

[takhslambos]

Bravo very nice lrl.can you make one for me?βαρεθηκα τη φτωχια........βοηθεια....help...

[stampa]

Here is my modified AL707.
It has many differences between AL707 but the working principle remains the same.
Enjoy it...:)

Good work Geo... as always

[Geo]

Good work Geo... as always

Thanks.
One day i"ll come for test:)

[Geo]

Bravo very nice lrl.can you make one for me?...help...

Sorry....:frown:

[humhum]

Congratulation Geo, how work your device with moving from left to right or with fix position(constant) , and can you make video with your Geogun . ;)

Regards.

[belalhpc]

Dear:
Is this device is available for sale and whether the specifications and results comparable to the Brazilian and German appliances (Mainero or the OKM)
And how much its price almost beginner and looking for something effective and favorable price.

[Geo]

Dear:
Is this device is available for sale and whether the specifications and results comparable to the Brazilian and German appliances (Mainero or the OKM)
And how much its price almost beginner and looking for something effective and favorable price.

Sorry, it is not for sale....
Photo was taken yesterday at a T.H....:)

[taxma1981]

http://www.youtube.com/watch?v=Ysu1BW4IwBk#t=11:razz:

[WM6]

Good work Taxma1981. Is this according Gold gun project?

[taxma1981]

yes is the variation of the a718 with some changes in the coils, the fet, with an amplifier and a threshold detector ...

[taxma1981]

http://s28.postimg.org/n7av6gvq1/IMG_20140918_182757.jpg (http://postimg.org/image/n7av6gvq1/)

[reza vir]

Hi my friend Geo
I congratulate you
Frequency Counter with LCD and create your beautiful best ;)

http://s5.picofile.com/file/8141485534/09042014050.jpg

[taxma1981]

Video?

[reza vir]

Hello dear friend, I did not video
The only difference is that it's good to see the image in the box embedded in a frequency meter for better accuracy and function of the frequency display

[taxma1981]

how the station a coordinate pal?

[reza vir]

What do you mean?
The circuit 718 is the same machine with the changes that created the geo-

[taxma1981]

20.27 Khz?18.1?19.58?

[taxma1981]

http://www.youtube.com/watch?v=MmbnhTbybzo

[taxma1981]

http://www.youtube.com/watch?v=gMgRefRDyJ4

[AurumKid]

Anyone can post the right pcb layout, part list and schematic for AL707?

TIA

AuKid

[WM6]

http://www.longrangelocators.com/forums/showthread.php?t=18458&highlight=gold+gun+al707

[AurumKid]

Hi WM6,

Thank you once again but there's no AL707 schematic on that thread. I searched and read all the threads here in LRL.com regarding AL707 and it dont exist. GoldGun AL718 is the only one I found.

Regards

[AurumKid]

there's AL707 pcb drawing attached. maybe i will refer on that photo.

[SWAMPY]

I tested both at the same target the same time many times.
I never had signal more than 70mv with gold gun so it had not ability to work.
Only one time at a mountain took high signal but there was nothing near it.
With geogun i have signal all the times.
Μιλαμε για αλλη κατασταση....:cool:
Geo,I also have the Gold gun Al707 here in Australia.My understanding is that you are looking for a null or low reading.If you are getting very low reading at a site where there is Gold mineral deposit then the Gold Gun appears to me to be working as intended?

Where did you get the Idea that you should be looking for a high reading?

If you don't have an instruction manual please post your address details and I will send
you a photocopy of mine.

Cheers,Swampy.

[abdou2014]

:D

[Nicolas]

:D

So nice i hope you good success

[SWAMPY]

Seems the the Gold Gun now has a different name[Advanced Geophysical Receiver]

Manual[http://accuratelocators.com/downloads/dl/file/id/20/agr_manual.pdf]

[liudengyuand]

Rubbish something

[abdou2014]

it is the same device :lol:

[Nicolas]

Seems the the Gold Gun now has a different name[Advanced Geophysical Receiver]

Manual[http://accuratelocators.com/downloads/dl/file/id/20/agr_manual.pdf]

Yes but so very expensive detector for 100 feet :D:(:(

http://accuratelocators.com/bgr.html

[SWAMPY]

Yes expensive,about the price of the latest Australian metal Detector the GPZ 7000[Australian $9500.

Of coarse the Australian Detector works and is finding heaps of Gold!

I wonder if anyone has found any large mineral deposits with the latest Gold Gun offering
from Accurate locators?

Do you reckon the theory as explained in the instruction manual is sound? Not many if any
good reports of the old version of the Gold gun ever finding anything?

Cheers,Swampy.

[Nicolas]

Yes expensive,about the price of the latest Australian metal Detector the GPZ 7000[Australian $9500.

Of coarse the Australian Detector works and is finding heaps of Gold!

I wonder if anyone has found any large mineral deposits with the latest Gold Gun offering
from Accurate locators?

Do you reckon the theory as explained in the instruction manual is sound? Not many if any
good reports of the old version of the Gold gun ever finding anything?

Cheers,Swampy.

No finding only mV:D:D:D

[Agraz]

swampy: Geo refers to the background reading, since there must be a high reading to be able to receive a low reading or null, I have gold gun Al707, and when I buy it from California I received here in Mexico high reading background, as 3000 mv . and when there was a null detect the reading low, (the amplifier and the meter must be used separately) but in 2003 I discovered that the ferrite antenna was broken in half, (it sounded something broken inside the white antenna) maybe that increased the reading because it received high frequencies, I returned it to accurate locators, and they put a new one and I no longer receive high reading ,,, maybe I should wind another broken (but pasted or overlapping) ferrite to try to receive frequency of about 50-100 khz, I have no idea how often I received it when it was broken, but the reading was more than three thousand milli-volts.

[SWAMPY]

swampy: Geo refers to the background reading, since there must be a high reading to be able to receive a low reading or null, I have gold gun Al707, and when I buy it from California I received here in Mexico high reading background, as 3000 mv . and when there was a null detect the reading low, (the amplifier and the meter must be used separately) but in 2003 I discovered that the ferrite antenna was broken in half, (it sounded something broken inside the white antenna) maybe that increased the reading because it received high frequencies, I returned it to accurate locators, and they put a new one and I no longer receive high reading ,,, maybe I should wind another broken (but pasted or overlapping) ferrite to try to receive frequency of about 50-100 khz, I have no idea how often I received it when it was broken, but the reading was more than three thousand milli-volts.

Well mate if you still have faith in the Gold Gun,probably the best thing you can do is try and find someone in your area with a Gold gun unit and compare his with yours.If his is giving both high and low readings like it should then I would suggest you contact Accurate locators again and tell them they didn't fix yours Properly the first time and explain to them why?

Good luck,let us know how you get on.

Cheers,Swampy.

[Geo]

Because weather these days are not good i decided to "see" my Geo Gun. I have 3..4 years to go out with it because at some frequencies it was oscillates.Maybe problem is at varicaps or at increasing of sensitivity. Also will try to supply it with Li batteries. I think that it is good for big buried objects.

Regards

[abdou2014]

HI Geo , i don't see lm324 , can we know your changes in schema ? :)

[Geo]

I did n't find the schematic yet. Maybe is inside the destroyed hard disk, i try to find it so to solve the problem. From what i see i use a TL071 a TLC272 and a LT?? for true RMS reading.
Also there is a 6 position selector switch so to select the right band. I change frequency via varicap.

[abdou2014]

expert parameter, I need your diagram , don't stop searching :)

[Geo]

Until now i did n't find full schematic...:angry:
The only that i found is the frequency selector.
Varicaps have capacitance between 20 and 500pF (if i remember ok).

[abdou2014]

thank you very much, we are missing only the receiver circuit and meter :)

[Geo]

Here is what i found from true rms meter.
There is n't schematic for receiver but it is the same as prototype with the difference of ic's.
I don't remember other changes...

[abdou2014]

thank you, I will try to find time for its realization :) I want to know does your gold gun have a good reception from VLF stations ?

[Geo]

Yes... always it receives at least one VLF station with signal more than 200mv.
As i saw at original GG when signal was lower than 150mv it was noise so no ability to detect any object.
Also is indicated only for big targets...

[abdou2014]

does it receive when the antenna is pointed towards the transmitter or in width or in both cases ?

[Geo]

I don't know who is the transmitter that it receives, i only look the meter for high signal and a narrow zero.

[abdou2014]

thanks, what is the length of each ferrite rod , wire diameter , number of turns ?

[Geo]

I use only one ferrite 20cm.
Inductance is near to 10mH per section.
Wire 0.2mm diameter
Turns... i don't remember:frown:

[abdou2014]

what's te distance between the two windings ? and the total inductance ?

[Geo]

I don't remember. Ferrite is closed in a plastic tube...
Total inductance must be more than 30mH..

[abdou2014]

Thank you :)

[Geo]

Until now i did n't find full schematic...:angry:
The only that i found is the frequency selector.
Varicaps have capacitance between 20 and 500pF (if i remember ok).

Today i measured the frequency of each band using this selsctor.
so i have

1. 24.6 .... 30.5 Khz
2. 17.8..... 25.5
3. 14.5.....19.7
4. 11..... 12.9
5. 9.7 ......10.9
6. 6.3 ......6.6 Khz

As you see it receives directly from 6 ... 33 Khz (-10db).
So with a good scan will find a strong vlf station inside one of all these bands.

:)

[abdou2014]

very good method :) I need to know the position of the two potentiometers (tune and volume) thank you :)

[Geo]

What do you mean????

[abdou2014]

where i connect these two pots ( tune and volume ) in the diagram ?

[abdou2014]

excuse me the tune pot is for the varicap
it remains that the pot volume which is not on the diagram

[Geo]

You must connect the other half of TLC272 to pin 8 of TL071 via 100n. Draw the same schematic with the other half and connect a potentiometer at output (pin1). Audio ampl must be at different box and far from lrl. GG is very sensitive to self-oscillations. Usyally i don't use the audio, only the meter.

[abdou2014]

Thank you :)

[taxma1981]

What do you think for this point?

https://youtu.be/ioXUAYkFxRM

[Pahom]

Question to all who are in the subject. I understand correctly that there are two circuits, one on the TL084 is an earlier circuit and the second circuit is on the LM324.

[Geo]

LM324 and TL074 are similar ICs. No differences for this simple circuit...
Both are quad op amplifiers.

:)

[Pahom]

LM324 and TL074 are similar ICs. No differences for this simple circuit...
Both are quad op amplifiers.

:)Too noisy without a signal to the station. I'll try to bypass the remaining two unused channels.

[Pahom]

And I found why it was making noise, fixed it. Cool receiver.

[folharin]

geo greetings!!

[Pahom]

And I found why it was making noise, fixed it. Cool receiver.

Maybe someone will come in handy.

[Pahom]

Maybe someone will come in handy.
:)

[Agraz]

To make the 707 gold gun work much better without the meter, you can touch the left side of the male banana connector (negative) with your hand to ground it and it begins to be more sensitive.