The point of the situation

[Geo]

Hi Franco.
Maybe tommorrow i will try to make it to oscillate. If all will go OK then i"ll try it again

Regards

[Tim Williams]

Hello everyone been a while. Just wanted to pop in and say hello to everyone. I see many are still working on electronic lrl. Been busy and have not had time to get on here. All the best to everyone. Carl I'm planing on being at the show if your there I'll see you.

Take care,

LRLMAN

[Geo]

Hello Tim.
Long time!!!!!
How are you???

Regards

[Geo]

Hi Franco.
Yesterday i made it to oscillate. I connected a trimer 3-9pf between 2nd and 3nd transistor. Also i removed the coil at input. Now without coil is more sensitive. It oscillates near to 3Mhz and the 3turns coil was as a short to the signal.
I connect the oscillator as modul to the LM358. So i made the other schematic with xtal and i tried at lab.All are ok and now i wait the weather to calm. Weather rains 24 houre.

Regards

btw.... do you have any practical way to check the lrl if works ok??? battery spark don't do anything....

[FrancoItaly]

Hi Geo

The only way to test my lrl it's to touch with my hand the antenna, I have a strong signal if it's working. For me it's important the coil but I have no tried without coil. The coil is separated from the oscillation stage by the first transistor therefore has no effect on it. As I said in RS thread I have not tried the LM358 stage alone because I have used other modified pistols with more gain but I had to reduce the gain as the "front-end stage" has very high gain. If You touch the antenna and the led lights I think that it's OK. Also here it's raining and I cannot go to test in the field.

Best Regards

[FrancoItaly]

Hi Geo

I tested the 2 working lrls and the last with the 2pF capacitor with a transmitter for remote control (about 430 Mhz) and this gives a strong signal at about 15 cm for the 3 lrls and with the stylus antenna 20 cm elongated. This test doesn't work with remote control for car but with remote-controlled electrical outlets.

Best Regards

[Tim Williams]

Doing well geo. all the best to you.

[FrancoItaly]

Hi Geo

I post here the last version of my lrl, it works well as the others, but it oscillates with the help of a small capacitor connected between collector of TR3 and base of TR2, the right value is 0.5pF (also 2 capacitors 1pF connected in series). With 2pF as your circuit the lrl dosn't cacht the phenomenon, I have tried this value. The DC out is 3V, if it is less You must increase C8 and vice versa. R11, R12, C13 and C14 are a low pass filter to remove any residue of high frequency signal. Also this lrl senses the silver coins at about 2 meters.
to increase the sensitivity You must lengthen the antenna, by this way it's possible a sort of pinpoint.

Best Regards

[goldfinder]

Originally Posted by FrancoItaly

Hi Geo

I post here the last version of my lrl, it works well as the others, but it oscillates with the help of a small capacitor connected between collector of TR3 and base of TR2, the right value is 0.5pF (also 2 capacitors 1pF connected in series). With 2pF as your circuit the lrl dosn't cacht the phenomenon, I have tried this value. The DC out is 3V, if it is less You must increase C8 and vice versa. R11, R12, C13 and C14 are a low pass filter to remove any residue of high frequency signal. Also this lrl senses the silver coins at about 2 meters.
to increase the sensitivity You must lengthen the antenna, by this way it's possible a sort of pinpoint.

Best Regards

When you say it works as well as the others what does that mean?

Are the silver coins buried in the ground or setting on the surface of ground?

goldfinder

[FrancoItaly]

Hi Funfinder
The silver coins are buried about 20 cm under ground 1 year ago .

Best Regards

[FrancoItaly]

Hi goldfinder
Sorry You are Gold non Fun...finder .

[Morgan]

Hi Franco


the coins are buried with some salt to make the PHENOMENON more active ,or without ?

[Geo]

Originally Posted by FrancoItaly

Hi Geo

I post here the last version of my lrl, it works well as the others, but it oscillates with the help of a small capacitor connected between collector of TR3 and base of TR2, the right value is 0.5pF (also 2 capacitors 1pF connected in series). With 2pF as your circuit the lrl dosn't cacht the phenomenon, I have tried this value. The DC out is 3V, if it is less You must increase C8 and vice versa. R11, R12, C13 and C14 are a low pass filter to remove any residue of high frequency signal. Also this lrl senses the silver coins at about 2 meters.
to increase the sensitivity You must lengthen the antenna, by this way it's possible a sort of pinpoint.

Best Regards

Hi Franco.
Thank you for the file.
What i see at NI stimulator is that this don't oscillate good. It oscillates near to 2.2Mhz modulated at 45Khz and after some seconds it oscillates only at 45Khz and again the same ... and so on...
How your oscillator works??

Regards

[Sneshko]

Hi FrancoItaly!
Please let me know what is the value of capacitor C3?
whether 22pF?
Thanks in advance for the answer!
Regards!
Sneshko

[FrancoItaly]

Hi All

The coins are buried without salt or no other substance, C3 is 22nF.
In my circuit the DC out is very stable, but this values depend on the gain of the transistors. The NI simulator does not allow to change the "beta" of transistor and this may explain the instability. I suggest you build the circuit with 0.5 pF and try different values for C6 and C8 to a proper DC out. If you don't have success try 1pF. The purpose is to have the max gain of the circuit and with a greater capacitor in the positive reaction we will be forced to decrease the gain by changing C6 and C8.

Best Regards

[detectoman]

i no see to brodhy morgan build or gave opinions, on this lrl

[Morgan]

Originally Posted by detectoman

i no see to brodhy morgan build or gave opinions, on this lrl

yes,correct,i have my LRLs,PDKs,remember ?

[detectoman]

then morgans, your think what yours lrl are the best non plus ultra? and then no need most prototipes propossal?

[Morgan]

Originally Posted by detectoman

then morgans, your think what yours lrl are the best non plus ultra? and then no need most prototipes propossal?

until now i dont know better LRLs...

[detectoman]

may be you no know the long range of me pecosy
puede ser porque usted no conoce los larga distancia mios pecoso

[Morgan]

Originally Posted by detectoman

may be you no know the long range of me pecosy
puede ser porque usted no conoce los larga distancia mios pecoso

your cacharros much better,show me the many gold, quesitos ocho escudos oro de los conquistadores que as encontrado,you have found

[detectoman]

brodhy morgan, yo solo he encontrado moneditas dispersas de cobre y plata como tu
una pregunta hermano, dime si tu pd ultima 4, solo tiene receptor pasivo o tambien tiene estimulador?
hermanito morgan, i only find coins separate of silver and coper how you, say me please if you pd 4, have only pasive receptor o too have estimulator coil

[Morgan]

Originally Posted by detectoman

brodhy morgan, yo solo he encontrado moneditas dispersas de cobre y plata como tu
una pregunta hermano, dime si tu pd ultima 4, solo tiene receptor pasivo o tambien tiene estimulador?
hermanito morgan, i only find coins separate of silver and coper how you, say me please if you pd 4, have only pasive receptor o too have estimulator coil

El PDK-4 es una copia de Grecia del PDK-2.2,

I dont have PDK-4,is Grrek clonage of my PDK-2.2

see photo of greek CLONE :

[detectoman]

then morgan you no use most pd whit a stimulator?
entonces morgan tu ya no usas la pd con estimulador

[Morgan]

Originally Posted by detectoman

then morgan you no use most pd whit a stimulator?
entonces morgan tu ya no usas la pd con estimulador

there is a hide stimulator coil...