AV multiband VLF receiver

[WM6]

Help PI detector project, 50X50cm can detect 5m, with 1x1m coil, which help me? Discrimination is not required,

You probably already know who would help you dig at 5m?

[liubing]

I look forward to explore 5M

[WM6]

I look forward to explore 5M

Good, pinpoint at 5m is +-2m. So you need to dig hole 5x4m. And not only one, there can be in hole some metallic ore only. Probably no problem for you?

[liubing]

I am here 20X20CM reach 2.5M, then undetectable basic thing that is buried very deep, but there are countless treasures underground, so I am committed to increasing depths

[liubing]

Who can provide the increasing depths of effective programs? Interested parties are welcome to explore a friend

[WM6]

Sorry, but I will left all those countless treasure to you.

Not interested in 5m (empty) hole digging adventure.

[mahditala]

help

Friends does not work on my device

[WM6]

Dear mahditala. This is a toy only, to play around, with intention to practice some basic electronic building and in hope to prevent you from buying highly overpriced crap as Mineoro, OKM etc., which does not work also.

And what is not working on your device, you got no sound out of it, or it cannot point you to golden treasure?

[edward]

Dear mahditala. This is a toy only, to play around, with intention to practice some basic electronic building and in hope to prevent you from buying highly overpriced crap as Mineoro, OKM etc., which does not work also.

And what is not working on your device, you got no sound out of it, or it cannot point you to golden treasure?

Hi wm6

I am working on this vlf receiver

I dont have ferrite rod 20 cm long in avilable

What do you reccomend me??

Can i use from shorter ferrite???

[WM6]

Can i use from shorter ferrite???

You can use ferrite from an old transistor MW radio.


As long you maintain ferrite antenna at 57mH, by proper number of turns,
band limits with proposed C values will be OK.


Answer on how to establish proper number of turns, you can find here.

http://www.longrangelocators.com/forums/showpost.php?p=142225&postcount=30

[edward]

You can use ferrite from an old transistor MW radio.


As long you maintain ferrite antenna at 57mH, by proper number of turns,
band limits with proposed C values will be OK.

Answer on how to establish proper number of turns, you can find here.


http://www.longrangelocators.com/for...5&postcount=30

You mean if i changed the length of the ferrite i need to set the inductance to 57 mH by changing number of turns
Ok
About vu meter: 1 mili amper full scale does not exist how can i measure the signal strength?? (Except using leds)

[WM6]

You mean if i changed the length of the ferrite i need to set the inductance to 57 mH by changing number of turns
Ok

By various length or diameter or Ferrite brands (composition) you need

to set inductance to 57mH by proper number of turns.
Otherwise you need to recalculate all bad capacitors.

About vu meter: 1 mili amper full scale does not exist how can i measure the signal strength?? (Except using leds)

Stay with in schematic proposed LED indicator.
You do not need 1mA VU meter.

[edward]

By various length or diameter or Ferrite brands (composition) you need

to set inductance to 57mH by proper number of turns.
Otherwise you need to recalculate all bad capacitors.







Stay with in schematic proposed LED indicator.
You do not need 1mA VU meter.

How can i recalculate the capacitors?

[abdou2014]

the antenna of my gold gun is 59mH

https://ibb.co/mMNpy0

what can I have with this schematic ???

[edward]

the antenna of my gold gun is 59mH

https://ibb.co/mMNpy0

what can I have with this schematic ???

This is gold gun???

The gold gun includes tow 3.5 cm ferrite rods with 337 turns wire 0.2 mm from center of each rod