Lrl from Italy

[FrancoItaly]

I think it's a good result similar to the one I got with 5 silver coins buried at 25 cm.
Probably gold is detected to greater distance.

[ouiarabe]

Originally Posted by FrancoItaly

I decided to change my LRL and run at 59Khz (gold frequency) but at the time I am away from home and I can not test it. In practice it is a species of regenerative receiver, but the oscillation is continuous, even without signal at the input. To achieve this a part of the signal, using 4.7K trimmer and 100pF capacitor, it is send to the coil. For the coil we may use about 100 turns and we have to choose the right value for the capacitor placed in parallel to the coil. The emitter capacitors of the second and third transistor they set the stage gain of each transistor and the value must be determined experimentally. I repeat that I have not made this change, and I hope that some of you have wanted to do it.
Best Regards

hi all
thank you sir Francoitaly
for your help and cooperation
just a question please
what is the value of both capacity

[FrancoItaly]

This version for me doesn't work, however you can try 1 nF for both and increase until you have 2-5Volt (DC output).

[FrancoItaly]

I have received requests to repost scheme of my lrl. It's the 8Mhz quartz version. Power-display(1 led) is the stabilized supply with led alert of low battery and 1 led for display. Display(3 led) is the scheme for 3 display leds but it is always necessary stabilized power supply.

[ouiarabe]

thank you very much Franco
I will build this device and keep you informed of the results

[taxma1981]

how to place a crystal and an antenna Frank; I want to make something similar to your own design, the crystal will go in front but what values of capacitors and resistors; and who will enter the antenna after the 2n4416

[FrancoItaly]

Sorry but I don't well undestand what you mean, in the past I tried other solutions for my lrl but this is the better, there is a lot of amplification and some change may cause autooscillation . I don't like FET transistor and the base of the first transistor for me is the better point for the antenna, I suppose that the base-emitter junction is important for phenomenon detection.
Regards

[taxma1981]

I mean the plan that I put.who i connect the antenna and the crystal?

[FrancoItaly]

I don't know, this is not my design, that comes from a modified rf sniffer, if you change transistors and schematic I cannot say nothing else.
Regards

[taxma1981]

I know that it is not the plan you simply request an aid for another ... you know about this

[humhum]

Design from Morgan or Who ??????

[taxma1981]

Originally Posted by humhum

Design from Morgan or Who ??????

Nein

[Geo]

Taxma, open a new thread, don't destroy the thread of Franco!!!!

[FrancoItaly]

Hi Geo,
How are you? I have already said privately taxma, his lrl is broadly similar to my LRL, but, as you say, it is better to test on the field my LRL and it's for this reason I posted my LRL on the forum. I already had privately confirmed the good functioning of my LRL and invite again all those who have had success to reveal it publicly on the forum.
Regards

[RS_Phil]

Originally Posted by FrancoItaly

I have received requests to repost scheme of my lrl. It's the 8Mhz quartz version. Power-display(1 led) is the stabilized supply with led alert of low battery and 1 led for display. Display(3 led) is the scheme for 3 display leds but it is always necessary stabilized power supply.

BC183 is hard to find here in my near electronic store can I replace this transistor of the same type?

Regards Saromines_R

[taxma1981]

with bc 547c work fine

[taxma1981]

I need antenna and ist ok

[taxma1981]

https://youtu.be/uCezifFu8Ss

[taxma1981]

Detect microwave why?




https://youtu.be/vAr6ByPwkn0

[FrancoItaly]

The resonant circuit connected to the antenna is in the range 100-150Mhz and sources of radio frequency which falls in this range (also with sub harmonics) affect the LRL especially if they are very close and in the house there are many sources of this kind. We can use these sources to test our LRL but my favorite test it's to touch the antenna and check the signal decreases, to do this set the threshold so that the LED is turned on weakly then by touching the antenna the led should go off.
Regards

[taxma1981]

I did this when handling the antenna, the voltage drops .. Detects static Yesterday rubbed the comb in the hair of 4 meters and started beating

[taxma1981]

how crystal is working better franko ?we can be put and largest;

[FrancoItaly]

If you mean the size of quartz, small size is equal to normal size. The frequency is no critic, I have used 4 - 6 - 8 and 10Mhz with no difference.

[taxma1981]

Frank 4-6 volts must have; measuring the exit to ground; so why zero .... 4-6 volts only shows measuring the exit and entrance front

[FrancoItaly]

I don't understand what you mean with "zero", the DC output of sensor stage, that's the rectified AC signal, it must be in the range 2-6V.