Lrl from Italy

[abdou2014]

HI FRANCO

HI HAKIM FROM ALGERIA I BUILT A NEW FRANCO LRL PHANTOM

http://www.longrangelocators.com/forums/showthread.php?t=19076&highlight=phantom

HOW TO TEST WITHOUT AN UNDERGROUND METAL FIELDS, CAN I TEST IT WITH A FUNCTION GENERATOR . IT DO NOT RESPOND TO ELECTRIC FIELDS LIKE TV. HOW I MADE FOR CALIBRATE IT FOR A RECEPTION BETWEEN 50 KHZ AND 80 KHZ. PLEASE HELP ME

[FrancoItaly]

Hi abdou2014,
the only thing you can do is touch the antenna and see if the signal at the output decreases and if so go out and search and found all the signals with metal detector.
Regards

[FrancoItaly]

Hi taxma1981,
The only thing that I see is that there is a signal in one direction, continuing to walk in that direction, what happens? If the signal stops after a few meters you have to check from other directions, normally the maximum sensitivity is from south to north, minimum from north to south and from east to west as the media also from west to east.
Regards

[taxma1981]

Thank you franko..why only of blue led plays; the red lights und the white up only when χρύπησει the buzzer?

[FrancoItaly]

In this scheme "http://www.longrangelocators.com/forums/showthread.php?t=19076&highlight=phantom" DL3 and buzzer are on for low signals, for medium signals is on also DL2 and and for max signals is on also DL1. DL3 and buzzer are always on when there is a signal.
Regards

[taxma1981]

the second POTENTIOMETER 470 does not work like and turning ...why?,

[abdou2014]

THANK YOU Mr FRANCO, WHAT IS THE VALUE OF OUTGOING FREQUENCY ?

[FrancoItaly]

P2 is for sensibility, on real field you must change P2 for no compass effect. The effective frequency (internal) of the Lrl is that of the quartz but there is not a direct link with the phenomenon, I think that the "heart" of the revelation of the phenomenon is Tr2.
I repeat that by chance I discovered this LRL. It was a rf sniffer in the range of FM that because of the parasitic capacitances of the circuit board is entered into oscillation about 5 Mhz. Later I improved the design by adding a first oscillator (CD4046, VCO and phase comparator) hoping to get some discrimination and a stable oscillation. Finally I designed the LRL with quartz, very similar to the original design, very stable and with the ability to change the frequency.
Regards

[taxma1981]

thank you franko: D

[abdou2014]

Mr FRANCO, CAN YOU PUT THE DIAGRAM OF YOUR FINAL LRL FOR BUILD IT . I HAVE NOT SUCCESSFUL IN THE PHANTOM VERSION .

[folharin]

somebody else built and tested this project?

[FrancoItaly]

PHANTOM version is the same that my final lrl, but not the printed board. What you mean when you say "not successful" ? When you touch the antenna the signal goes down?
Regards

[abdou2014]

when I turn it on, there is not a signal in antenna , and when i turn threshold the leds will light one by one with a buzzer sound

[FrancoItaly]

in the antenna there is no measurable signal, the output (TR5 emitter) there must be a DC signal in the range 1-6V (you can choose for example 4V). To change the output signal you must act on the total value of C2, C3 and C4 which adjusts the amount of signal that will be amplified by TR1, TR2, TR3 and TR4. If the output is zero you have to increase the capacity, remove C2-C3-C4 and in their place put a 1pF capacitor, if not just put 1.5pF and so on until you get 4V output (for example). The output signal must be stable and touching the antenna with a finger signal output should decrease slightly
Regards

[abdou2014]

the output of TR5 is 2V , is it ok ?