Lrl from Italy

[taxma1981]

This lrl work fine,

https://youtu.be/l3nH9CG0lI8

[WM6]

Evidently.
It can detect U-boot at 1 cm distance.

[taxma1981]

I have marks and outside in nature

[Geo]

This lrl work fine,
https://youtu.be/l3nH9CG0lI8

my VLF (made in china) also makes the same

[taxma1981]

This is the lrl franko with 4046 not mein

[Geo]

Hi Franco.
What is happening when your lrl catch the phenomenon (or locates the buried coins)?
1. At xtal version, at emmiter of tr5 and
2. At pll version , at pin2 of 4046
Voltage increase or decrease??

Regards

[FrancoItaly]

Hi Geo,
With xtal version voltage increases at emitter of Tr5 with the phenomenon, with pll version the voltage decreases at pin 2.

Best Regards

[Geo]

Hi Geo,
With xtal version voltage increases at emitter of Tr5 with the phenomenon, with pll version the voltage decreases at pin 2.

Best Regards

Thank you Franco

[RIMES]

thanks

[Bill512]

Hi Geo,
With xtal version voltage increases at emitter of Tr5 with the phenomenon, with pll version the voltage decreases at pin 2.

Best Regards

Franco, in my PLL the voltage increases.
More specifically, the voltage measurements at pin 2 was not reliable ,because the interference from the probes was enormous.
So instead of pin 2 , the voltage at the R4-C5 node and also at R5-C6 node was measured.
For example, from an initial voltage of 3V this voltage goes to 3.5 or even to 4.5V in case of strong "signals".
I don't consider this as a problem, is just info.

[FrancoItaly]

Hi Bill512
It's possible that the voltage increases, this depends on the phase of the amplified signal compared to that of the VCO 4046, the critical point is in the TR1 stage that's drived by a pulse signal. Probably C3, TR1 and P2 can be eliminated and you can connect directly C8 and pin 4.
Best Regards

[Geo]

I reinstated the audio at normal position (it was reverse) and fixed the case.
Now Franco's lrl is ready for T.H......

[WM6]

Nice! Look like indestructible design.

Geo you should put on it "Made in EU" "Manufactured in Greece".

[Geo]

No, i don't like "EU".
I am sure that you understand why????

[WM6]

No, i don't like "EU".
I am sure that you understand why????

So I provoke you.

What material you use for housing, FR4 (Cu plated vitroplast) or it is wood in whole?