Lrl from Italy

[Napsterce]

Hello friends, in the 8mhz quartz version can i replace TR1-TR5 BC183C with BC550C? Is it better with stylus or with coil antenna? What kind of wire should i use for L1, what diameter and lenght? And last but not least, any experience with Franco,s lrl?

[FrancoItaly]

As I said every transistor BC...C series works well, then also BC550C works well. L1 it's not critical, you may use 1mm wire, 10 mm diameter and 10 mm in length. Stylus antenna is better, also more easy to build. I invite all those who have built my LRL to tell their experience in the field. This is also why I wanted to disclose my instrument. This is meant to be an open source project, in which everyone can work together to improve it.

[mustefa ubram]

The latest version of 8MHz LRL system with Polygon pcb.

I am busy completing projects

[Napsterce]

Mustefa which project is this, what schematic? Is that a voltage regulator or?

[dream_man]

Originally Posted by mustefa ubram

The latest version of 8MHz LRL system with Polygon pcb.

I am busy completing projects

Great Job man. Please upload the latest PCB and let us make it to recover new results.

[mustefa ubram]

Originally Posted by Napsterce

Mustefa which project is this, what schematic? Is that a voltage regulator or?

this is 8mhz franco circuit
My voltage supply is 16V.The circuit needs to 12V.I've used 12-volt regulator

[pigeon]

may be that it is the same mustafa

[pigeon]

:

[pigeon]

Originally Posted by Napsterce

Mustefa which project is this, what schematic? Is that a voltage regulator or?

thank you MUSTAFA

[mustefa ubram]

Originally Posted by pigeon

may be that it is the same mustafa

my freind my name is mustefa not mustafa.
ok Maybe are like

[pigeon]

Originally Posted by mustefa ubram

my freind my name is mustefa not mustafa.
ok Maybe are like

hi mustefa


I am not specialized in electronics but I try to do something

thank you

[Napsterce]

Hello, what are p1 and p2 used for in the 8mhz version? What do they tune?

[dream_man]

Hello, they adjust threshold and sensitivity of IC.

[vlf]

Hello Franco,
I built your 8mhz and display stage with 3 led. I am a radio amateur and my other hobby is the metal detector. I m impressed from your device. The main point is the connection (or mixing) between oscillator antenna and amplifier input. I had to set 2 wires instead 3 capacitors 1pf for out < 6V, may be the parasitic capacity is to high on my PCB . Perhaps I should separate the oscillator?
I think an extern stable 12 voltage regulator for battery is necessary?

Best Regards to all in this forum!

[FrancoItaly]

Hi vlf
I've used this trick in a copy of my LRL (I built 10 LRL). It's a system used by radio amateurs, I recommend using a separate PCB for sensor stage also for also to avoid auto-oscillations, but if you have < 6V and the voltage decreases when you touch the antenna the sensor stage it's ok. It's necessary a 12V voltage regulator, I repost here my original PCB for sensor stage and schematics, the power stage it's only in 1 led version, but it's necessary also in 3 leds version.Of course you can also use other solutions, I have also provided a low battery indication.

Best Regards

[mustefa ubram]

hi to all and franco
I finished the 8mhz project.Using the transistor bc 237c.The project is very high sensitivity .Ultimately device sensitivity is very stable
Reveals mobile radiation from a distance of 5 m.Reacts to the radio remote control of 1 meter.By touching the antenna output voltage is decreased.Everything happened according to Franco.(Sensitivity and reduced voltage by touching the antenna).
But today tested in practice:
About a year ago I buried my 2 gold coins.At a depth of about 60 to 70 cm.After a year I went there today for testing.Unfortunately, the device did not show any reactionI tested from different directions SE to North and East to West, North to South and vice versa.I use the new system of two modes: fixed and variable capacitors .I used the fixed type of capacitor 22p in parallel with the coil .In this mode I tested did not react devicesI used the variable mode of the variable capacitor in parallel with coil And tested in various modes and again no result
Franco What do you think?
What is the problem? The purpose or the system?
please guide me?

[UltraLRL]

Maybe its not working at all!!
Does any one have a field test???

[mustefa ubram]

Originally Posted by UltraLRL

Maybe its not working at all!!
Does any one have a field test???

yes About a year ago I buried my 2 gold coins.At a depth of about 60 to 70 cm.After a year I went there today for testing

[FrancoItaly]

Hi mustefa,
Your LRL seems built properly, unfortunately I could not test my LRL in real research, I can only say that in my test field, as I said, I buried 5 silver coins, 25cm deph. Perhaps 60 or 70cm it is too deep to issue the phenomenon after a year, try buried at 20 cm. Try also to extend the antenna. Vanco Dojranliev says "40 cm depth ..2 gold rings 4 grams of 18k gold ..40 days buried "

https://www.youtube.com/watch?v=yR3tzT2Jd-g.


Best Regards

[mustefa ubram]

Originally Posted by FrancoItaly

Hi mustefa,
Your LRL seems built properly, unfortunately I could not test my LRL in real research, I can only say that in my test field, as I said, I buried 5 silver coins, 25cm deph. Perhaps 60 or 70cm it is too deep to issue the phenomenon after a year, try buried at 20 cm. Try also to extend the antenna. Vanco Dojranliev says "40 cm depth ..2 gold rings 4 grams of 18k gold ..40 days buried "

https://www.youtube.com/watch?v=yR3tzT2Jd-g.


Best Regards

thank you franco
Do you think deep failing system?
10 silver coins placed on how deep it is appropriate to test?
And for how long?

[dream_man]

Hello Dear Franco ;
First of all thanks for publishing your LRL and answering our questions from simple to critical.
I'v not seen the rout of the selected items in your schematic, so I connected them as the below picture shows. I proposed the rout, please check whether is correct or not. In case of mistake, please recommend me how to do. thank you.

[pigeon]

hi all

please anyone have the pcb for this version

thank you

[dream_man]

Hello Dear Franco ;
First of all thanks for publishing your LRL and answering our questions from simple to critical.
I'v not seen the rout of the selected items in your schematic, so I connected them as the below picture shows. I proposed the rout, please check whether is correct or not. In case of mistake, please recommend me how to do.

1. In display stage, pin 1 of P2 is connected to R2 and the middle pin is connected to out of IC1A, but how about Pin 3 of P3?

2. Are connected R3,R4,R5, and R6 together? or they are connected to the inverting input (-) of IC2A, IC2B, and IC1B ?

3. I've downloaded your CompPcb.pdf of sensor stage, please upload the display stage as well if possible.

[FrancoItaly]

1. Pin 3 of P2 is not connected, P2 is used as variable resistance.

2. the inverting input (-) of IC2A, IC2B, IC1B and the output of IC1A are connected together.
R3/R4 to pin + IC2B --- R4/R5 to pin + IC2A -- R5/R6 to pin + IC1B.

3. I have PCB only of the sensor stage, the only that's critical. I think there is no problem for other PCBs.

Best Regards

[dream_man]

Originally Posted by FrancoItaly

1. Pin 3 of P2 is not connected, P2 is used as variable resistance.

2. the inverting input (-) of IC2A, IC2B, IC1B and the output of IC1A are connected together.
R3/R4 to pin + IC2B --- R4/R5 to pin + IC2A -- R5/R6 to pin + IC1B.

3. I have PCB only of the sensor stage, the only that's critical. I think there is no problem for other PCBs.

Best Regards

Thanks dear Franco for your supportive and productive information.