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  #3001  
Old 05-17-2023, 05:33 PM
Babak Ruby Babak Ruby is offline
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[ QUOTE = FrancoItaly؛ 162220 ] [/QUOTE

Is Can we remove the oscillator from the circuit with a switch and control the zero volt border in different areas with a digital display?
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  #3002  
Old 05-18-2023, 10:03 AM
FrancoItaly FrancoItaly is offline
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[ QUOTE = FrancoItaly؛ 162220 ] [/QUOTE

Is Can we remove the oscillator from the circuit with a switch and control the zero volt border in different areas with a digital display?
If you unplug the oscillator the lrl doesn't work, the sensor stage amplifies the oscillator signal and the phenomenon somehow interacts with it in mixer TR2.
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  #3003  
Old 05-18-2023, 12:24 PM
Babak Ruby Babak Ruby is offline
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If you unplug the oscillator the lrl doesn't work, the sensor stage amplifies the oscillator signal and the phenomenon somehow interacts with it in mixer TR2.
What I mean is to put a switch after the oscillator so that before exploring, we can set the zero volt limit of the sensor output in different geographical areas with a voltmeter, then put the oscillator in the circuit to explore, please.
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  #3004  
Old 05-18-2023, 03:00 PM
FrancoItaly FrancoItaly is offline
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What I mean is to put a switch after the oscillator so that before exploring, we can set the zero volt limit of the sensor output in different geographical areas with a voltmeter, then put the oscillator in the circuit to explore, please.
Maybe I didn't explain myself well, if you disconnect the oscillator at the sensor stage output there are 0V anywhere in the world.
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  #3005  
Old 05-18-2023, 04:06 PM
Babak Ruby Babak Ruby is offline
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I am using the digital display in your plan and I want to put a switch for the oscillator to make sure that the output of the sensor is zero in different areas and then connect the oscillator.
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  #3006  
Old 05-18-2023, 04:11 PM
Babak Ruby Babak Ruby is offline
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I doubt that this will not have a negative effect on the performance of the oscillator
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  #3007  
Old 05-19-2023, 02:58 PM
abdou2014 abdou2014 is offline
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HI DEAR FRIEND FRANCO , I HAVE A FRIEND WHO HAVE PROBLEM IN VOLTAGE OUTPUT TR5 ?
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  #3008  
Old 05-19-2023, 03:10 PM
FrancoItaly FrancoItaly is offline
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You can decrease R13 from 4.7K to 3.9K or 3.3K to get around 4V but 3.3V is an acceptable value. Regarding TR5, the correct voltage is obtained during the calibration phase as explained in the helps.
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  #3009  
Old 05-19-2023, 03:17 PM
abdou2014 abdou2014 is offline
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HE HAS 0.3 V AT TR5 EMITER
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  #3010  
Old 05-19-2023, 03:39 PM
FrancoItaly FrancoItaly is offline
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As I told you the voltage on the emitter of TR5 depends on the setup.
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  #3011  
Old 06-01-2023, 07:39 AM
Basellafe Basellafe is offline
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The same problem l have 3mv
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  #3012  
Old 06-01-2023, 10:19 AM
FrancoItaly FrancoItaly is offline
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The same problem l have 3mv
With the quartz disconnected can you get a self oscillation? Are the transistors all type "C" with gain greater than 500? To increase the gain (and obtain self oscillation) as well as increasing C13/c14 you can decrease R10/R12, for example 560 or 470 ohms.
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  #3013  
Old 06-01-2023, 03:01 PM
Basellafe Basellafe is offline
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Without quartz 0 volt on tr5 emeter tr1and5 is bc549c tr2.3.4 isbc183c i tryed to change value to resester 10 .12 no change and 4.7 no change
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  #3014  
Old 06-01-2023, 03:24 PM
FrancoItaly FrancoItaly is offline
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Without quartz 0 volt on tr5 emeter tr1and5 is bc549c tr2.3.4 isbc183c i tryed to change value to resester 10 .12 no change and 4.7 no change
Connect the quartz and vary C2/C3/C4 until you have an output voltage, for example leave only C2 (1 pF), if that's not enough put C2/C3 in parallel (2 pF). The self oscillation is due to a parasitic connection of the pcb, maybe it doesn't happen in your case.
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  #3015  
Old 06-01-2023, 03:27 PM
FrancoItaly FrancoItaly is offline
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I post the Dream Man pcb at the request of a forum member.
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  #3016  
Old 06-03-2023, 11:56 PM
Basellafe Basellafe is offline
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Second board works
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  #3017  
Old 06-04-2023, 10:05 AM
FrancoItaly FrancoItaly is offline
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Second board works
Can you post it here?
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  #3018  
Old 06-04-2023, 11:53 AM
Basellafe Basellafe is offline
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https://youtube.com/shorts/he5oUehvAak?feature=share3
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  #3019  
Old 06-04-2023, 02:59 PM
FrancoItaly FrancoItaly is offline
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is it another version of Dream_Man pcb?
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  #3020  
Old 06-04-2023, 04:15 PM
Basellafe Basellafe is offline
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Yes iranian vertion but the same direction of lines of dream man pcb
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  #3021  
Old 06-04-2023, 04:29 PM
FrancoItaly FrancoItaly is offline
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Yes iranian vertion but the same direction of lines of dream man pcb
Can you explain better for other forum members?
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  #3022  
Old 06-04-2023, 05:33 PM
Basellafe Basellafe is offline
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They have to read 122 bages
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  #3023  
Old 06-06-2023, 07:11 PM
Basellafe Basellafe is offline
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.
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  #3024  
Old 06-06-2023, 07:13 PM
Basellafe Basellafe is offline
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I want to ask you franco about my device ist working right or not . but about Electronic lighter there's no effect
https://youtube.com/shorts/1IjinwcVNHA?feature=share3
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  #3025  
Old 06-07-2023, 10:07 AM
FrancoItaly FrancoItaly is offline
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I want to ask you franco about my device ist working right or not . but about Electronic lighter there's no effect
https://youtube.com/shorts/1IjinwcVNHA?feature=share3
I always recommend checking that by touching the antenna the signal decreases, in this way we know that the sensor stage works correctly and there are no self oscillations. The other tests are not valid and the definitive test is in the field with a metallic target (silver or gold) buried for a few months. Without a test field you have to try it in any terrain and check the signals with the metal detector.
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