Lrl from Italy

[liudengyuand]

What is your maximum depth

[brain]

This design and circuit of Mr. Franco, which has been slightly strengthened by our good friends, and of course it is much better to increase the distance of the sensor from the discipline. However, it is very powerful and sensitive.

Is it possible to send PCB of this?

[brain]

hello, have you tried the franco telescopic antenna with a copper or other metal antenna?

[brain]

Franco TR1 Emitter The 8 MHz oscilloscope screen is to be what value.

[FrancoItaly]

Franco TR1 Emitter The 8 MHz oscilloscope screen is to be what value.

The value is not critical, it is in the 1/3 V peak to peak range. Varying C2 / C3 / C4 you get the right voltage value at the sensor stage output. You could also put a semi-fixed potentiometer in place of R3 for easier adjustment.

[brain]

Tr1 Emitter Image Pictured.

https://imgyukle.com/i/0bS4U

I added a 30/40pf capacitor to the Tr4 collector. This is how I solved it.

[FrancoItaly]

I do not understand what happened, I put the post back

The value is not critical, it is in the 1/3 V peak to peak range. Varying C2 / C3 / C4 you get the right voltage value at the sensor stage output. You could also put a semi-fixed potentiometer in place of R3 for easier adjustment.

[brain]

I do not understand what happened, I put the post back

The value is not critical, it is in the 1/3 V peak to peak range. Varying C2 / C3 / C4 you get the right voltage value at the sensor stage output. You could also put a semi-fixed potentiometer in place of R3 for easier adjustment.

do you look at the picture

https://imgyukle.com/i/0441q

[FrancoItaly]

do you look at the picture


https://imgyukle.com/i/0441q

I don't understand what the 30 / 40pf capacitor to the Tr4 collector is for.

[brain]

Tr4 toplayıcıya 30 / 40pf kondansat?r?n ne işe yaradığını anlamıyorum.

Add See. Notice that the droops are from here.

[Locator]

"Phenomenon"

Hello Franco,


i read your theme and i notice that you have alot of patience in your answers,bravo!
As about "phenomenon"(Greek word)i think that gold,silver and copper(but mainly gold and silver)when they are placed(burried)for years in the ground(due to their electrochemical reaction with the soil)become something like antennas with the result that when a radio signal hits them it increases(the signal)and we can catch this increase with any LRL...your's or Mineoro e.t.c.


My regards:


Christos

[FrancoItaly]

Hello Franco,


i read your theme and i notice that you have alot of patience in your answers,bravo!
As about "phenomenon"(Greek word)i think that gold,silver and copper(but mainly gold and silver)when they are placed(burried)for years in the ground(due to their electrochemical reaction with the soil)become something like antennas with the result that when a radio signal hits them it increases(the signal)and we can catch this increase with any LRL...your's or Mineoro e.t.c.


My regards:


Christos

I think your theory is correct but incomplete, as the magnetic field also comes into play in the phenomenon due to the different orientation sensitivity.

[brain]

Is the phenomenon always positive? Or is it negative?


I have detected 2 locations with your sensor. Both are positive, but the iron phenomenon is also effective. Do you have any ideas for this?

[FrancoItaly]

Is the phenomenon always positive? Or is it negative?


I have detected 2 locations with your sensor. Both are positive, but the iron phenomenon is also effective. Do you have any ideas for this?

In my experience the phenomenon is always positive and my various lrls are insensitive to iron, a fact confirmed by other members of the forum, however other members (Geo for example) affirm that instead the lrl is also sensitive to iron. Probably some types of ground can be the cause of this.

[brain]

In my experience the phenomenon is always positive and my various lrls are insensitive to iron, a fact confirmed by other members of the forum, however other members (Geo for example) affirm that instead the lrl is also sensitive to iron. Probably some types of ground can be the cause of this.

What do I need to do to prevent the iron, can you share some information about it?