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  #501  
Old 07-15-2015, 12:50 PM
FrancoItaly FrancoItaly is offline
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I decided to change my LRL and run at 59Khz (gold frequency) but at the time I am away from home and I can not test it. In practice it is a species of regenerative receiver, but the oscillation is continuous, even without signal at the input. To achieve this a part of the signal, using 4.7K trimmer and 100pF capacitor, it is send to the coil. For the coil we may use about 100 turns and we have to choose the right value for the capacitor placed in parallel to the coil. The emitter capacitors of the second and third transistor they set the stage gain of each transistor and the value must be determined experimentally. I repeat that I have not made this change, and I hope that some of you have wanted to do it.
Best Regards
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  #502  
Old 07-15-2015, 10:25 PM
tanrila tanrila is offline
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thanks master franco with best regard for you
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  #503  
Old 07-19-2015, 10:05 AM
FrancoItaly FrancoItaly is offline
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Hi detectoman,
I can not send you a private message:
"detectoman has exceeded their stored private messages quota and cannot accept further messages until they clear some space."
Regards
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  #504  
Old 07-20-2015, 05:28 AM
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jjaja ok franco, i see fix these, regards
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  #505  
Old 07-21-2015, 01:47 AM
brs brs is offline
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Default franco help me

hi franco
VU meters using
I want to be linked to lrl quartz version
Where you can connect and link IC1A , IC1B , IC2A or IC2B
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  #506  
Old 07-21-2015, 04:20 AM
brs brs is offline
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TR1 5V
TR2 0V
TR3 1,1V
TR4 1,2V
TR5 4,57V
PIN 1 IC1 0, 800V and
Increases with voltage lighting gradually
---------------------
PIN 7 IC1 10.58V
And IC2 10.63V
With the lighting voltage is reduced without gradually to 1v
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  #507  
Old 07-21-2015, 10:53 AM
FrancoItaly FrancoItaly is offline
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First unplug the oscillator disconneecting C2, the voltage of TR2-TR3-TR4 collectors have to be in the range 3 - 5V, to increase the collector voltage should increase the resistance between collector and base and vice versa.
For TR5 emitter 4.57V is ok. You can connect the VU meter at PIN 1 of IC1 with the calculated resistance suitable for 11 volt full scale. IC2 is not necessary and you can use IC1B for buzzer.
Regards
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  #508  
Old 07-21-2015, 11:42 AM
brs brs is offline
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thank you Mr franco
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  #509  
Old 07-21-2015, 08:18 PM
brs brs is offline
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hi franco
bc183c Alternative bc550c
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  #510  
Old 07-22-2015, 09:39 AM
FrancoItaly FrancoItaly is offline
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Yes it's ok
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  #511  
Old 07-31-2015, 02:28 PM
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darkman darkman is offline
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Question new sensor

any Professional one here try any thing with new sensor stage ?
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  #512  
Old 07-31-2015, 04:18 PM
FrancoItaly FrancoItaly is offline
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The new sensor stage, self oscillation type, it's very critical and unstable and I do not recommend. Instead I have modified the Lrl with CD4046 and I lowered the frequency to about 59 Khz (gold frequency?) It's very stable but I have not tested on real field. I used a ferrite coil with 200 turns (1.8 mH). If the lrl is ok on the field I will post the circuit diagram.
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  #513  
Old 08-01-2015, 04:24 PM
FrancoItaly FrancoItaly is offline
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I just got back from the test field , unfortunately no signal from silver coins and a gold bracelet buried for over a year, so my ferrite coil LRL is not working.
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  #514  
Old 08-01-2015, 04:53 PM
brs brs is offline
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Thank Franco
If quartz device best
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  #515  
Old 08-01-2015, 04:56 PM
brs brs is offline
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Battery and handle hand must be far away from the circle PCB
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  #516  
Old 08-02-2015, 06:36 AM
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Quote:
Originally Posted by FrancoItaly View Post
I just got back from the test field , unfortunately no signal from silver coins and a gold bracelet buried for over a year, so my ferrite coil LRL is not working.
Bad news but no problem, you have so many workable versions.
Hello Franko, continue your fantastic work.
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  #517  
Old 08-02-2015, 10:34 AM
FrancoItaly FrancoItaly is offline
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Hi Geo,
Thanks for the compliments, there is still a chance for the ferrite coil LRL, in fact I had no connected the stylus antenna, now I have done but I can not go in the test field, too hot and too many mosquitoes.
Best Regards
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  #518  
Old 08-02-2015, 01:25 PM
iam_7up_gamer iam_7up_gamer is offline
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Hi franco , how are you ?
That is bad news .
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  #519  
Old 08-03-2015, 11:18 AM
FrancoItaly FrancoItaly is offline
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I'm fine but I will return soon to Switzerland and will not return until a few months. The tests will be for autumn.
Regards
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  #520  
Old 08-06-2015, 05:34 PM
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detectoman detectoman is offline
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hello lrl builders brothers here i show yours my new lrl prototipe 2015 this is in aware of tries and news possible implementations i gave special thanks to my friend FrancoItaly for iniciate us in these actual projects a embrace for you and for all, gun semms succesfull here i need try in fields but havent gold buried but 20 coper coins https://www.youtube.com/watch?v=5RDR...ature=youtu.be
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  #521  
Old 08-09-2015, 02:21 AM
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detectoman detectoman is offline
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a strange lrl whit capability for detect all class metal near the antens also static plastic
https://www.youtube.com/watch?v=53If...ature=youtu.be
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  #522  
Old 08-26-2015, 11:47 PM
brs brs is offline
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Default My question to Mr. Franco and interested

Mr. Franco
Do the phenomenon(Electromagnetic energy) of all-metal buried until flattened iron manufactured phenomenon
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  #523  
Old 08-27-2015, 12:43 PM
FrancoItaly FrancoItaly is offline
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I must say that not much is known of the phenomenon, but I'm sure the iron is not detected, any form has.
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  #524  
Old 08-28-2015, 12:37 AM
brs brs is offline
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Thank Franco
worked on the assembly of a new quartz device and the work I have 2 silver ring at a depth of 40 cm was discovered phenomenon of almost antenna Pen distance 1.5 meter and be prompt on the place also discovered from the north to the south only
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  #525  
Old 08-28-2015, 10:54 AM
FrancoItaly FrancoItaly is offline
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You say that you have detected 2 silver ring at 1.5 meters in north south direction?
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