Lrl from Italy

[Qiaozhi]

Originally Posted by Napsterce

Yes that is coreect but i will try to use the MFD transmitter with your lrl. Like i said, i hope that it will amplify the phenomenom field so it would be easier to be catched by your lrl. The MFD you have built was with powered L rods? By what schematic you have built the MFD? Thank you.

http://www.geotech1.com/cgi-bin/page...mfd1/index.dat

[FrancoItaly]

I don't remember well but the MFD was a NE555 oscillator and I touched the oscillator output,
my body was like an antenna. The frequencies were 32Hz for gold and 42Hz for silver, but, I repeat, the results were not satisfactory.

[dream_man]

Originally Posted by pigeon

hi all friends


i have built dream man pcb I use a bc190c place bc183c is that they have the same location.

i have not electricity in the pcb no power

help me soory for the little english

thank you

Hello pigeon;

[brs]

Hello my friends
Amplify the phenomenon of the field
MFD
Frequency that penetrates the ground
HZ , KHZ OR MHZ

[brs]

Do FM transmitter circuit, for example, it helps to amplify the phenomenon

[Napsterce]

Brs have you tried this or it's just an opinion? What should be the input of the fm circuit? Where to connect the output, in the ground like MFD or in air? Thank you.

[brs]

Just a question I'm not an expert in the transmitter circuit or phenomenon happens I hope that the experts the likes of Franco I support us with information

[FrancoItaly]

The phenomenon is very little known, even to many does not even exist. I do not think you can make changes without completely changing my LRL. My advice is to build my LRL and see that it works properly and only then can you think of some adjustment, mainly the L1 / C10 frequency. However, even so my LRL is quite sensitive, since I privately know that a forum member found some gold coins (dating back about 200 years ago) to 15 m away. Do not ask other details because I myself do not know them, but I have no reason to doubt. This discovery demonstrates that gold needs a long time to be revealed and therefore is not very suitable to perform tests.

[dream_man]

Hello dear Franco;
I did some tests by 2 months buried cooper and silver coins and unfortunately just one LED turns on near the test field. I tested your Varactor Idea along with L1 from 2 to 9 turns. In 2 turns, I have 5.5 volt which has low sensitivity to electrical waves like wireless phone (30 cm 3 LEDs will be on). On the other hand, when I increase the number of turns of L1, the output voltage drops and it goes to be more sensitive to the waves (3 meters 3 LEDs). I realized that lower output voltage brings more sensitivity.
There is another important point. If my test was right, it shows just 1 LED turned on. So I think we must increase the sensitivity in revealing section in display stage. Is it possible to do such idea by decreasing R1 and increasing R2 in display stage?
Thank you dear Franco. overall its my results.

[FrancoItaly]

Hi dream man,

Yes it's possible for have more gain to increase R2 and decrease R1, the important thing is to avoid compass effect. Also only one led on in field test it's acceptable, because there are many variables in play, metal type, soil type, time of burial. Test with wireless phone are not important, you have to test in a real field with buried target.

Best Regards

[dream_man]

R1 and R2 in display stage?

[FrancoItaly]

yes

[dream_man]

Thank you Franco. I'll test it and reply my results.

[pigeon]

Originally Posted by dream_man

Hello pigeon;

hi dream man
thank.but i have problem the lrl not work les not work?!

[mustefa ubram]

hi franco
I've tested the sensor output with 3 -2-1 capacitor of 1p.(c2-c3-c4)

The output voltage for each of the different

with 3 capacitor:2.5v

with 5 capacitor:5v

with 1 capacitor:6.2v
Which is the best situation?

[mustefa ubram]

Originally Posted by mustefa ubram

hi franco
I've tested the sensor output with 3 -2-1 capacitor of 1p.(c2-c3-c4)

The output voltage for each of the different

with 3 capacitor:2.5v

with 2 capacitor:5v

with 1 capacitor:6.2v
Which is the best situation?

edited

[FrancoItaly]

In theory there is no difference because the gain does not change, but if you wanted to increase the gain you can use the 3 capacitors and then have 2.5V and increase C13 / C14 until you have about 5V, but it is better to increase the gain of display stage, especially to avoid self oscillations.

[dream_man]

Hello dear Franco;
As you mentioned earlier, after preparing the circuit, we must disconnect c2,c3 and c4 and measure the output voltage, it must be zero. Then you suggested using a 1pF cap instead of c2,c3 and c4 and measure the output voltage, if it is lower than 5 we must increase c13 and c14. What about high amplification and self oscillation If we increase c13 and c14 in order to obtain a greater amplification?,,, I mean, is there any bad side effect on this circuit if we increase c13 and c14 in order to have a 5 volt output?... which one is better, using 1 single 1pF or using three 1pF in series and increasing c13 and c14? .. sorry for this question

[FrancoItaly]

Hi dream man,

We have to have some gain in the sensor stage and this depends mainly on the amplification of TR2 / TR3 / TR4, unfortunately (unlike operational amplifiers) can not be established during the design phase, so we must act on C13 / C14 to get the correct gain. I recommend for this operation to disable the oscillator and to vary C13 / C14 for maximum gain (no self-oscillation).Once it has obtained the maximum gain you can find the right value for C2 / C3 / C4.

Best Regards

[dream_man]

Thank you Franco for replying;
but how to ensure that we have the maximum gain. after disconnecting c2,c3 and c4, what output voltage we must have in the TR5 emitter?
by increasing the C13 and 14 we increase the output voltage while quartz is disconnected. So the main question is finding the right value for c13 and 14. Please recommend a way to realize the right value.

[FrancoItaly]

Hi dream man,
while quartz is disconnected you must have in the TR5 output 0 volt. With quartz connected and c2,c3 and c4 disconnected you may have a few volts at output and this is a parasitic coupling and this is not negative (if the signal is stable and the sighal goes low by touching the antenna). On the contrary connect C2/C3/C4 for about 5 volt at output, however, it is not necessary to have at all costs 5 V, a lower gain at this stage may be offset by the display stage.

Best Regards

[dream_man]

Thank you dear Franco for your productive information;
I disconnected the quartz and increased C13 and C14 to 4.7nF (472 tag) and at this value I have 0.05 volt in the TR5 emitter. Then I connected the quartz and in place of C2 and C3 I replaced a 3pF and 27pF in series and got a total capacitance of 2.7pF. At this state, the TR5 emitter has a 4.85 volt. Is it correct that I configured those capacitors in series to get 2.7pF ? or this value is high?... whats your suggestion if any? ... thank you in advance dear Franco.

[FrancoItaly]

I think it's perfect, every installation is a special case, which depends on the tolerance of the components, especially the gain of the transistors and the parasitic capacitance of the PCB.
I also want to celebrate the thousandth post of this thread and I hope that many of you are able to build my LRL. I will add that with my LRL has been made a very, very important find.

[Napsterce]

Hello Franco, important find like a find in the circuit, or an important find like gold, silver... 😃😃

[dream_man]

Hello Franco...
Really fantastic... after the changes I've mentioned above, I tested the circuit at home. Surprisingly, I got one LED on near refrigerator and I thought that is because of its electricity wire but it was not. After that I've opened the refrigerator's door and after a while when the air came out all 3 LEDs turned on. I think the weather inside the refrigerator is ionized and circuit catchs it. It's great Franco. At least for me it responds.