Lrl from Italy

[brs]

TR4 = 6.37V voltage value, and if you connect the antenna increases the voltage
TR5 = 6.65V

[FrancoItaly]

Collector voltage of TR4 is better about 5V , change the 1M resistance base-collector to 820K or 680K or collector resistance from 4.7K to 5.6K. Emitter voltage of TR5 must be less than 6V. The lrl is very sensitive to the proximity of the human body and the important thing is that there be variations touching the antenna. However, it is crucial the field test. It is also important that the handle is long enough to keep the body away from the LRL, I think that is a fair measure 25cm.

[brs]

thank you mr.franco

[RS_Phil]

May TR5 V out is more than 5V only twisted magnetic wire i used on C2 C3 C4..if I disconnect the wire i measure more than 2V..one problem I have is a poor sound on my buzzer or cracking audio..i used 12v buzzer,..any suggestion master franco? by the way when i touched the wire or pass to the other transistor like Q2 or Q3 the led turning OFF is it the indication that my board is working correctly?

Best regards

Saromines_R

[FrancoItaly]

You can disconnect the wire because it is not necessary because it is sufficient the only parasitic capacitance. If you touch the antenna and the led goes off the lrl is ok. I think that you must change the buzzer, some types sound stronger than others while working with the same voltage, or You can put the buzzer outside the box.
Regards

[brs]

Mr. Franco
put the shield connected to the negative pole 12v- and when I rounded the hand of the resistance is affected by the changing

[RS_Phil]

You can disconnect the wire because it is not necessary because it is sufficient the only parasitic capacitance. If you touch the antenna and the led goes off the lrl is ok. I think that you must change the buzzer, some types sound stronger than others while working with the same voltage, or You can put the buzzer outside the box.
Regards

Ok master franco thanks for advise

[abdou2014]

HI Mr FRANCO I WOULD LIKE TO ASK YOU ABOUT DUAL ANTENNA
HANDHELD AND STYLUS IN ONE . I THINK THIS METHOD IS USED TO CREATE A MAGNETIC FIELD WITH THE STYLUS ANTENNE TO KEEP AWAY THE POSITIVE ION FROM THE INTERRIOR ANTENNE . AND DETECT ONLY THE NEGATIVE ION . IF MY THEORY IS TRUE PLEASE SHOW ME HOW IS MADE THIS ANTENNE

[FrancoItaly]

I do not understand what you mean, in my opinion is the best single antenna, also not sure that the ions are part of the phenomenon, also ions require a large input impedance, and is certainly not the case with my LRL. First of all realize my LRL and verify its operation and after you think about changes.
Regards

[abdou2014]

I BUILT ALL VERSION OF YOUR LRL . WHEN I PUT MY HAND NEAR THE ANTENNA THE LED LIGHTS. IT IS VERY SENSITIVE. IT CAN DETECT THE STATIC CHARGE OF THE HUMAN BODY.AND ALSO ELECTRONIC DEVICE FROM A LONG DISTANCE. WHAT DO YOU SAY ABOUT THIS RESULT . GOOD OR FALSE ?

[FrancoItaly]

Yes this is ok,my LRL is sensitive (like other instruments of this kind) to magnetic or electrical noise source.
Regards

[abdou2014]

Thank you Mr Franco. And what follows from this work. to cancel the electricity and magnetic fields earth ?

[FrancoItaly]

The LRL is used outdoors, where there is no interference. The LRLs are unusable close to every kind of transmitters.

[gwlwudi]

hi,FrancoItaly

I made you 8mhz sensor stage circuit, however, crystal oscillator can not afford earthquake. Then I simulate the circuit, remains the same, is not crystal to crystal active it?

Thanks !

[FrancoItaly]

Look at my post n.552, crystal oscillator must be active, TR2, TR3 and TR4 amplify a small part of the signal coming from the oscillator. If disconnects the Quartz there should be no output.