Lrl from Italy

[pigeon]

Here I reply you by what Franco recommended earlier ;

"The heart of all the LRL is the high gain part consists of TR2, TR3 and TR4; if the gain is too large this part goes into oscillation and it's very unstable, if instead the gain is too low, the phenomenon is not revealed.I use the type BC183C transistors because I own a lot, but you can use equivalent types (BC109C, BC209C, BC239C and so on) the important thing is that they are NPN silicon with high "beta" (suffix "C"). The RF gain of the amplifier,for a certain range of frequencies, depends on the value of C13 and C14, the lowest value = less amplification and vice versa."

"The best antenna is a stylus 80cm-100cm. With 30cm it has the minimum sensitivity, the greater the length the greater the sensitivity. With these changes, it is possible to detect targets that were previously ignored, such as, for example, short time metals buried (1 month or more) in your test field."

Hope it helps you.

thank you

[mustefa ubram]

hi mustafa

is what you can give me a picture to facilitate
fixing the choke coil and the antenna

thank you very much

dear freind You can not have a fixed chokes.Because you need to adjust the resonant frequency and the air-core coil.You can test for proposed Franco 3turn coil and The parallel capacitor 22p.This is a fixed amount.
best wish

[pigeon]

dear freind You can not have a fixed chokes.Because you need to adjust the resonant frequency and the air-core coil.You can test for proposed Franco 3turn coil and The parallel capacitor 22p.This is a fixed amount.
best wish

ok thank you

[dream_man]

Hello dear Mustefa;
Your 8MHz crystal circuit has some problems. c8 is not located and R5 is not connected before c8 and c7. May you find more errors on that. I've drawn a circle on the wrong place in the below picture.

[brs]

hi frands
I'm placing
tr1 2n5551
tr2,tr3,tr4 and tr 5 C9014
but high sensitivity to influence the compass and the sky

[dream_man]

Hi there ;
Anyone has a correct and an updated PCB of 8MHz crystal circuit? ... Kindly upload it if you have.

[Hadi]

Dear Franco I have not experience in the construction of electronic musical instruments, electronic organs and other electoinic instruments but i have experience in physic's experiments.

If you make some experiments with nano-pulses in HV domain you will see that envelope of nano-pulses have almost perfect sawtooth wave shape - so it have infinite superpositions of both odd and even harmonics over wide frequenc range. If you succedd to make an Unipolar nano-impulse you will get pure potential impulse with zero current running. This kind of impulses are basic of scalar longitudinal waves. So am pretty sure that gold treasure radiate above described zero current - high potential impulses (remember burnt front-end LRL electronics of Alonso Geo and many others LRL hunters). And yes they (nano-impulse) influent E-field of your telescopic antenna and parallel tank-circuit changing amplitude and phase of your LRL. And they deca with 1/r law.

Best Regards from Russia
Enjokin4

Hello dear Enjokin4

I design this program and circuit. In this program, pulse train so you can change frequency and duty cycle and can to change delay of next pulses (OOK modulation).
The pulses are bipolar. Also you can change turns of second wire transformer to make bipolar high voltage.

[pigeon]

persian 10leds

hi all friends

i have this projet by persian forum. it is correct

thank you

[pigeon]

10leds

hi

[pigeon]

hi all

if these projects are okay, help me make one

by persian forum

thank you all

[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]

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.