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Originally posted by FrancoItaly
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Why so much
Knowledge is the greatest wealth -
perhaps in this range there are emissions in the frequency on which the phenomenon acts. It was a coincidence that my LRL works, is not due to my studies, I have just realized that this circuit (RF sniffer) could reveal the phenomenon. I tried to change some values, such as inductance, capacitance in the resonant circuit, crystal frequency (3 to 10Mhz), but the best are the ones that I have indicated.Comment
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Hello Franco. How are you????
Long time!!!!!!!.............GeoComment
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Hi Geo
I'm fine and you? In this time what did you do? you counted the gold coins that you are getting?Comment
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During this time I have not much time to look for treasures ... I'm waiting for someone who has built my LRL that can prove it on the ground. I'm also testing a type of PI metal detector that only works a few microseconds after the pulse, but it is difficult with the means available to a hobbyist. Currently I am in Switzerland but I come back Saturday for an electronics fair in Genoa where I always find something to buy, such as a bag with hundreds of electronic components to 1 euro...
RegardsComment
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Hi Franco.
Some problems with my health don't let me (for instant) to go for T.H. This time that i have very good LRLs i have n't the ability to work them
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Regards
GeoComment
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franco
your frq is 3mhz.Why not use the L/C circuit the resonant frequency 3mhz?!!!!!!
In this frequency of the circuit is the best performance
Knowledge is the greatest wealthComment
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franco
your frq is 3mhz.Why not use the L/C circuit the resonant frequency 3mhz?!!!!!!
In this frequency of the circuit is the best performance
franco What duty c8-c9 in 4046 model?
what is best value for c8-c9?
How is must The amplitude of the output the signal in c9?Knowledge is the greatest wealthComment
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The frequency from quartz or vco is not important and is indipendent of LC frequency, it's only a carrier that is modulated by the phenomenon. You must think to C8 and C9 as a single capacitor, in my case I have used 2 capacitor 1pF in series to have 0.5 pF. The exact value depends on the parasitic capacitance. in one case I removed the two capacitors and LRL worked fine. At point X (TR4 collector) there must be a signal from 2 to 4V peak-peak .Comment
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Thank you franco
not importance frq ok?can i replace 100kh or less with 3mhz for carrier signal?Knowledge is the greatest wealthComment
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I don't understand what you mean with 100Kh. The better frequency is in the range 3-10 Mhz.Comment
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Well, but this means that the LRL works in the lab but what it feels is not the phenomenon but electromagnetic sources. Now you need to go to a real field, and the only adjustment is the sensitivity, if it is too sensitive you have the compass effect and if not sensitive enough you do not feel the phenomenon.Comment
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electrical appliances does not beep, wants strong signal to do; the detector circuit can work with 9 volts; in video I have the circuit of your detector FrancoComment
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