The point of the situation

[Dedevil]

I think with these types of detection of this kind it is important to shield out electrostatic effects around the detector. Even the type of glue or silicone used can change the performance. I remember esteban used teflon, but there are other substances which we can all try and post results. Also body static from clothing, etc, can affect the detector. Maybe it would be a good idea to enclose the circuit boards in a shield to ground to reduce this.
rgds

[FrancoItaly]

Hi Geo
With my lrl I have a good pinpoint only with the brass bullet (very old I think) thats with small signal, more than 1 meter no signal. The great problem is for signals not confirmed by MD in the range of 2-5 meters and in a field with too much vegetation. I'm not sure that is important a good shield, it may be an obstacle to phenomenon. All my lrl are in plastic box and the "front-end" in open air and I use a long handle to avoid body influence.

Best Regards

[humhum]

Hi FrancoItaly , in your schema I see that have connection for one Antenna , but in your LRL Picture you use three Antennas for what, maybe LRL works with Two Tx and One Rx antenna.

Franco for more sens you make- try connection from your device Ground to your body with cable. (this info was from Big Master Esteban)


Regards.

[Sneshko]

Hi All

I want to remind you that at the beginning in this forum almost all of us believed not to "lrl phenomenom" but when Esteban told us that lrl was a real working instrument and that the phenomenom was real and that it could be revealed in many way, then I started experimenting, at the beginning with the PD pistol, after with BFO, E-field and B-field instrument. I must confess that I had many disappointments but the successes obtained by Morgan and Geo they stimulated me to continue. Obviously I thought the words of Morgan and Geo and in addition I was convinced that the "sky/compass" effect was the demonstration that all my instruments (I think more then 30) they detected some strange but real phenomenom. Unfortunately the sky/compass effect is more strong that lrl signal and then a not well designed lrl it cannot sense the phenomenom. We can think to sky/compass effect as a low impedance and low voltage source and the lrl signal as high impedance and high voltage source, if we measure with a low impedance instrument we lose the high impedance signal and if our instrument emits a strong signal (TX coil) than this fact also kills the lrl signal. But the question is not simple, a high impedance instrument also senses the "trees/walls" effect and as a last thing the lrl signal depends on the orientation and I think that the sky/compass effect acts as a channel. The Key is (for me) an amplifier stage in a self oscillating mode, but without signal saturation. I have realized some of this lrl and they work but I wait for tests by Geo. The problem is that the circuit is difficult to calibrate, I can't explain as it can oscillate with a stable but not saturated signal. This circuit is similar to a super regenerative receiver. In the circuit there are 4 transistors BC183C or similar with "beta" more then 500, the DC out is in the range 2-7V and when I connect the scope the DC out drops to zero, then no oscillation. The circuit is derived from a RF sniffer in FM range, but I think that the frequency in my case is much less, not depending from LC tank. This stage is the "front-end" and it is followed by a motion stage/comparator and then led and buzzer. The stage oscillates also without antenna and when we touch the antenna the signal out varies considerably. In the field the optimal adjustment is when there is no sky/compass effect.
Best Regards

Hi FrancoItaly!
My previous post was not a good translator translated.! I'm sorry!
Maybe the solution is to use a good receiver for the detection of weak signals (and, at the same time), rejecting noise.
One such circuit is the schematic below:



If you are interested, I can send you the full article about this circuit?
Regards!
Sneshko

P.S.
Please administrator to delete the previous post!
Thank you!
Sneshko

[FrancoItaly]

Hi Humhum
All 3 antenna are connected together in parallel but in the last version of my lrl I have only one antenna 20 cm elongated with same good results. Maybe a connection between body and ground increases sensitivity but perhaps also for sky/compass effect, but I think that the phenomenon is mainly over the ground. For Sneshko I thank you for the schema, but only a good receiver is not sufficient to catch the phenomenon, the key is an oscillator stable, with low RF emission, without big coil and much influenced by external factors, mainly by e-field (remember the stylus antenna).
Best Regards

[Geo]

A photo from Franco's LRL.


Regards

[Morgan]

A photo from Franco's LRL.


Regards

good luck with this one too.

if results in Greece are not good,you can send me to test here.


regards

[Geo]

good luck with this one too.

if results in Greece are not good,you can send me to test here.


regards

Why not????
But i must wait at least one month because the soil moisture is very high.

Regards

[Geo]

Yesterday i tried it at field but did not work. It stop to oscillate.
I don't know why!!.
Soon i"ll look it

Regards

[FrancoItaly]

Hi Geo
Put the 2pF capacitor between collector third transistor and base of second transistor, try some values of the emitter capacitor for 3 - 6V of DC out, I have made this change and in my laboratory it works well, but I have not tested in the field .

Best Regards

[Geo]

Hi Franco.
Maybe tommorrow i will try to make it to oscillate. If all will go OK then i"ll try it again

Regards

[Tim Williams]

Hello everyone been a while. Just wanted to pop in and say hello to everyone. I see many are still working on electronic lrl. Been busy and have not had time to get on here. All the best to everyone. Carl I'm planing on being at the show if your there I'll see you.

Take care,

LRLMAN

[Geo]

Hello Tim.
Long time!!!!!
How are you???

Regards

[Geo]

Hi Franco.
Yesterday i made it to oscillate. I connected a trimer 3-9pf between 2nd and 3nd transistor. Also i removed the coil at input. Now without coil is more sensitive. It oscillates near to 3Mhz and the 3turns coil was as a short to the signal.
I connect the oscillator as modul to the LM358. So i made the other schematic with xtal and i tried at lab.All are ok and now i wait the weather to calm. Weather rains 24 houre.

Regards

btw.... do you have any practical way to check the lrl if works ok??? battery spark don't do anything....

[FrancoItaly]

Hi Geo

The only way to test my lrl it's to touch with my hand the antenna, I have a strong signal if it's working. For me it's important the coil but I have no tried without coil. The coil is separated from the oscillation stage by the first transistor therefore has no effect on it. As I said in RS thread I have not tried the LM358 stage alone because I have used other modified pistols with more gain but I had to reduce the gain as the "front-end stage" has very high gain. If You touch the antenna and the led lights I think that it's OK. Also here it's raining and I cannot go to test in the field.

Best Regards