Franco's LRL ver_4046

[Geo]

I have make all the versions of Franco's lrl (except this at 59Khz).
Other worked good other nothing. I had a wooden box and decided to put inside the version with 4046 that i had constructed before long time. I shielding the box with foil and have put inside the pcb... baterys etc. I saw that now it did n't beep when i touch the antenna.
So i open this thread to talk about it with all that you have constructed it.

A photo from box for begining....

[Geo]

here the file from Franco....

At collector of Tr4 (point X) i measure a voltage of 4.6V dc.
At pin 2 of 4046 i measure 3.010V and when i touch the antenna it falls to 2.090V (20 mv difference), but don't beep. I decided to give more gain at IC2A by decreasing R6.
Any other idea??? or problems from you??

[abdou2014]

Nice Work ! how did you calibrate Franco LRL at this frequency ?

[FrancoItaly]

Hi Geo,
Good work, but I don't know if my lrl works at this frequency, I have tried but with bad results. TR2-TR3-TR4 stages work well in the range 2-10Mhz, with 59Khz you must change C13 and C15, try 10 or 20nF, TR1 is also the "heart" where is the detection of the phenomenon, the base-emitter junction has a capacity of about 10pF, compatible with the resonant frequency of L1 / C1, very far from 59Khz. However, in the collector of TR4 you must have 1-4 volt AC, also check that the LRL functions in reverse mode as happened to another member of the forum. At pin out of LM358A there is some change touching the antenna? If not there is a wrong bias in LM358A, If this is the case try to connect a resistor (about 100K) between the pin - of the LM358A with + 12V and if there are no results with ground.
Best Regards

[Geo]

Originally Posted by FrancoItaly

Hi Geo,
Good work, but I don't know if my lrl works at this frequency, I have tried but with bad results. TR2-TR3-TR4 stages work well in the range 2-10Mhz, with 59Khz you must change C13 and C15, try 10 or 20nF, TR1 is also the "heart" where is the detection of the phenomenon, the base-emitter junction has a capacity of about 10pF, compatible with the resonant frequency of L1 / C1, very far from 59Khz. However, in the collector of TR4 you must have 1-4 volt AC, also check that the LRL functions in reverse mode as happened to another member of the forum. At pin out of LM358A there is some change touching the antenna? If not there is a wrong bias in LM358A, If this is the case try to connect a resistor (about 100K) between the pin - of the LM358A with + 12V and if there are no results with ground.
Best Regards

Hi Franco.
I don't want to make it to work at 59Khz, only i wrote that i constructed all your versions except this at 59Khz. I did n't measure the pinout of IC2 when i touch the antenna but what i see is that some times the voltage of pin2 of 4046 is increased and other is decreased and i can't understand why. I connected a portable (no gnd) oscilloscope to see for self-oscillations but it works ok. Will try to decrease the output of Tr4 lower than 4v and to see what happens after it.

Regards

[enjoykin4]

Hello Signore Geo

About Franco PLL-LRL


With P1 you can adjust frequency of CD4046. Good starting value 3 MHz. Try lower frequecny. For P1 use good quality 25 turns 100K trimmer potentiometer for fine tunning frequency.

P2 is saturation 1k trimmer potentiometer and adjust amount of signal amplitude which goes to mixer stage L1-C11-C10-C9-C8-Tr2. This part is crucial for proper working. You must not SATURATE mixer stage or you can't catch "scalar signa" from the antenna. There is present some kind of "scalar edge modulation" of input signals by PLL from noble metals.

Scalar filed is make each time when two vector Electric fields E striking each other with 180 degree phase shift. One of condition for scalar generation is the system must be in resonance.

At joint point R17-R16-Collector T4 should be a nice sinus 3Vpp which decrease sharp when you touch the antenna with hand(s).

The antenna is very important stuff. Right spin wounded antenna is different from left spin wounded antenna. Try both. Also try left-right or right-left windings for anrtenna. For example 35 turns left when 180 degre change direction when wight windings.

This FrancoLrl should be examined and tested very carefully with lot of experimenting.

I wish you luck.
Reg.Enjoykin4

[FrancoItaly]

As says enjoykin4 it's better to work with original frequency, about 3Mhz or less ( at max working frequence the CD4046 absorbs more current). At 59Khz L1 is short circuit for the phenomenon, I propose this change, a ferrite rod as antenna and a transistor for amplify the 59Khz signal.

[Geo]

Originally Posted by FrancoItaly

As says enjoykin4 it's better to work with original frequency, about 3Mhz or less ( at max working frequence the CD4046 absorbs more current). At 59Khz L1 is short circuit for the phenomenon, I propose this change, a ferrite rod as antenna and a transistor for amplify the 59Khz signal.

Franco, i don't like to work 59 Khz
Do you use translator???????

[enjoykin4]

Geo and others who make Franco4046LRL -> for the antenna use original Francoitaly coil antenna with 70 windings. For better distance use more than 70turns . I have a good results with 700 turns 0.4mm diameter magnet wire without spacing between turns.

Use "star" grounding. All ground wires go to one point and that point to sheild box.

[Geo]

Originally Posted by enjoykin4

Hello Signore Geo

About Franco PLL-LRL


With P1 you can adjust frequency of CD4046. Good starting value 3 MHz. Try lower frequecny. For P1 use good quality 25 turns 100K trimmer potentiometer for fine tunning frequency.

P2 is saturation 1k trimmer potentiometer and adjust amount of signal amplitude which goes to mixer stage L1-C11-C10-C9-C8-Tr2. This part is crucial for proper working. You must not SATURATE mixer stage or you can't catch "scalar signa" from the antenna. There is present some kind of "scalar edge modulation" of input signals by PLL from noble metals.

Scalar filed is make each time when two vector Electric fields E striking each other with 180 degree phase shift. One of condition for scalar generation is the system must be in resonance.

At joint point R17-R16-Collector T4 should be a nice sinus 3Vpp which decrease sharp when you touch the antenna with hand(s).

The antenna is very important stuff. Right spin wounded antenna is different from left spin wounded antenna. Try both. Also try left-right or right-left windings for anrtenna. For example 35 turns left when 180 degre change direction when wight windings.

This FrancoLrl should be examined and tested very carefully with lot of experimenting.

I wish you luck.
Reg.Enjoykin4

Hi Enjoykin4, thanks for your advices.
About potentiometers i use multiturn as you say. Only difference is that i adjusted P2 for 4.6v out at collector of TR4. Will try to readjust it.
P1 can't tune PLL higher than 2.7Mhz but i don't see any problem to it.
About antenna i use a simple stylus without coil. Do you think that the coil version is better??

Regards

[Geo]

Originally Posted by abdou2014

Nice Work ! how did you calibrate Franco LRL at this frequency ?

Wich frequency???
4046 works near to 2.5Mhz...