help me - help me

[Anwar2]

Hi J-player
see this photos do u think this frquecis are correct I think it working but I dont know hwo its work the sound ok
tooooo like tthis when Iturn pot the sound come soft and stop and get small sound like seeee

[J_Player]

Hi J-player
see this photos do u think this frquecis are correct I think it working but I dont know hwo its work the sound ok
tooooo like tthis when Iturn pot the sound come soft and stop and get small sound like seeee

Hi Anwar2,
500 Hz and 100 KHz is exactly correct according to the factory specifications.
Some people have been running at 333 Hz and 120 KHz and they say this will also work.

Best wishes,
J_P

[Anwar2]

Hi Anwar2,
500 Hz and 100 KHz is exactly correct according to the factory specifications.
Some people have been running at 333 Hz and 120 KHz and they say this will also work.

Best wishes,
J_P

thanks man and Iadjust the coils placment ( small coil RX ) its detects metals But the distance Im not agree with it may be I used ceramic capasitors for the coils because the mica not availabe in the market here in Dubai

[J_Player]

thanks man and Iadjust the coils placment ( small coil RX ) its detects metals But the distance Im not agree with it may be I used ceramic capasitors for the coils because the mica not availabe in the market here in Dubai

Hi Anwar2,
The Mica capacitors have only one advantage.
Mica capacitors are very stable when the temperature changes.
When you use Mica capacitors, the frequency will not change when the temperature changes.
If you can see the TX and RX are at the same frequency, then you should be able to find good tuning with the null control and the sensitivity control, even if they are not Mica capacitors.
But if the TX frequency is different than the RX frequency, then you should make adjustments to make these two frequencies the same.
This can be done by changing the coil capacitors, or by changing the turns on one of the coils until both the TX and RX are the same frequency. (best to change the capacitance to make same frequency).

You can look here to find the method for tuning after the frequencies are the same for TX and RX: http://www.longrangelocators.com/for...8&postcount=59

This circuit is only for the original factory circuit that was designed for short range detection.
It is the exact circuit that was found in the locator that the factory sold more than 40 years ago.
The range for detection was originally less than 1/2 meter when the factory sold these detector kits.
But many experimenters say they find longer detection range after they make modifications to the circuit.
I do not know exactly what modifications these experimenters make to find longer range detection.
Maybe some LRL experimenters can show what modifications are needed to find long range detection from this circuit.


Best wishes,
J_P

[Anwar2]

Hi yes J_player your correct Im from Hot tropical country when I used the pistol in cold room and I adjust the pot on pefect point the sound being very low but when I got out of the room the sound been loader and very hight ....and frquency got changed
first time I thought this device may be temprature tester but when u told me about the mica capasitor and reson of use
ibleve ur information are correct 100%

[hamidmatris]

hi j player.
I had a few questions.

What's this?
This is a pd?





This circuit is better or what have you introduced?
Complete one works best?

[J_Player]

hi j player.
I had a few questions.

What's this?
This is a pd?

This circuit is better or what have you introduced?
Complete one works best?

Hi hamidmatris,
From what I can see, this circuit is not the same as the circuit that I posted above.
I posted the original factory design of a metal locator which was designed in the USA, showing how to modify it to put it into a pistol shape.

The circuit you show has similarities to my circuit, but it has been modified in many places.
I see changes in the nulling circuit, and several other component values which were changed in other parts of the circuit.
I also see a complete separate RF receiver is added with a demodulator and filter section.
Then I see the audio amplifier and speaker are changed to be replaced with a piezo beeper after mixing the signals from the locator and the receiver in a strange way.
There is no speaker and there is no meter on the circuit you show.
This means you cannot calibrate this circuit for null by using the meter as I have shown above, and you cannot expect the meter to show the pinpointing test correctly.

My opinion is this circuit is not the same as the circuit which I show above.
But this circuit has the appearance as being a modification to the circuit I show above.
I do not know if it is better than my circuit or not.
I have heard no reports to tell the performance of my circuit and comparative performance of the circuit that you show.

Maybe the circuit you show is better performance, maybe it is the same, or maybe it is worse.
I don't know.

Best wishes,
J_P

[hamidmatris]

What's this?





Help me pls.

[hamidmatris]

Hi hamidmatris,
From what I can see, this circuit is not the same as the circuit that I posted above.
I posted the original factory design of a metal locator which was designed in the USA, showing how to modify it to put it into a pistol shape.

The circuit you show has similarities to my circuit, but it has been modified in many places.
I see changes in the nulling circuit, and several other component values which were changed in other parts of the circuit.
I also see a complete separate RF receiver is added with a demodulator and filter section.
Then I see the audio amplifier and speaker are changed to be replaced with a piezo beeper after mixing the signals from the locator and the receiver in a strange way.
There is no speaker and there is no meter on the circuit you show.
This means you cannot calibrate this circuit for null by using the meter as I have shown above, and you cannot expect the meter to show the pinpointing test correctly.

My opinion is this circuit is not the same as the circuit which I show above.
But this circuit has the appearance as being a modification to the circuit I show above.
I do not know if it is better than my circuit or not.
I have heard no reports to tell the performance of my circuit and comparative performance of the circuit that you show.

Maybe the circuit you show is better performance, maybe it is the same, or maybe it is worse.
I don't know.

Best wishes,
J_P

tnx for your answer

[J_Player]

What's this?





Help me pls.

I don't know what this is.
It is not part of the project which I show above.
My circuit has no parts which look like the photos you show.
You should send an email to the person who made your photos and ask what is the part that you have circled.
Maybe the person who made the photographs knows what that part is.


Best Wishes,
J_P

[sakis1]

thanks man and Iadjust the coils placment ( small coil RX ) its detects metals But the distance Im not agree with it may be I used ceramic capasitors for the coils because the mica not availabe in the market here in Dubai

Maybe they capacitors in TABUK
REGARD > >zarkinos <

[Morgan]

I don't know what this is.
It is not part of the project which I show above.
My circuit has no parts which look like the photos you show.
You should send an email to the person who made your photos and ask what is the part that you have circled.
Maybe the person who made the photographs knows what that part is.


Best Wishes,
J_P

This looks one of the PD sold by Vasilis the greek LRL maker,
the object behind the Omega coil is the Ferrite.

[J_Player]

This looks one of the PD sold by Vasilis the greek LRL maker,
the object behind the Omega coil is the Ferrite.

Hi Morgan,
If this is the PD sold by Vasilis, then anyone who wants to know for certain about the details can send an email to Vasilis.
This circuit board is not the same as the schematic I see below it, and it is not the same as the schematic I made.
This circuit board I see is a modification of the circuit we see printed below it.
I think only the person who built this modified board will know all the details for what the parts are.


Best Wishes,
J_P

[vali]

Hello hamidmatris. Has a ferrite on the radio waves are used to receive signals. Andreas will help if you ask. Thanks......

[WM6]

This is Ferrite antenna.