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  #251  
Old 09-12-2017, 05:49 AM
kaligula kaligula is offline
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Yesterday the wether was clear and in open space on test poligon with small target with 0,2 gram gold this device didn't register nothing. For difference few days ago at same place few days ago at same place I catch few week signals which i can't pinpoint, maybe thay was from storms away around. I tried and both times with different capacitors. At home is recognising some signals.
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  #252  
Old 09-30-2017, 10:14 AM
kaligula kaligula is offline
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So, now i tried reaction of lrl Franco Italy and pdk A13 of Nicolas with transmitter of Fisher TW6 , so Franco Italy has no reaction of tw6 at all.PDK A13 has wide range of reaction with changing the capacitor form 1,5 nf to 47nf. But Franco Italy is reacting of other targets whose pdk a13 can't reach. So now we have to see on terrain what will be the reaction. By the way I'll make and Totem and we'll keep trying.

https://youtu.be/xdPC8gs78OE
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  #253  
Old 10-04-2017, 08:52 PM
kaligula kaligula is offline
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I cant understand why with changing capacitor with various values from 1,5nf to 47 nf it's still catching signal from tw-6, but can't catch signals that Franco Italy lrl is catching.
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  #254  
Old 01-25-2018, 07:41 PM
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Treasureshunter Treasureshunter is offline
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Hi my friends
Please help. Me
What is size for this project
Pdk A13 what is size
Ex quse me
I can not write english
I am from iran
Tancks
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  #255  
Old 01-25-2018, 08:15 PM
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ASHIL ASHIL is offline
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Quote:
Originally Posted by Treasureshunter View Post
Hi my friends
Please help. Me
What is size for this project
Pdk A13 what is size
Ex quse me
I can not write english
I am from iran
Tancks
Hi my friend
The PCB size is 49*95 mm
Good Luck
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  #256  
Old 01-27-2018, 12:47 AM
sakher sakher is offline
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Hello my frinds
Is necessary that the name of transistor bc548 end with a letter C ?
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  #257  
Old 01-27-2018, 09:55 AM
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ASHIL ASHIL is offline
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Hello my frinds
Is necessary that the name of transistor bc548 end with a letter C ?
Hi my friend
For best result yes necessary to use C class transistor because have higher (hfe)
Good Luck
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  #258  
Old 01-27-2018, 12:01 PM
sakher sakher is offline
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so.. can i use bc173c instead of bc548c because i dont have it .
thank you my frind
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  #259  
Old 01-27-2018, 01:30 PM
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dojranski dojranski is offline
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Originally Posted by sakher View Post
so.. can i use bc173c instead of bc548c because i dont have it .
thank you my frind
BC 548 SILICON .NPN TRANZISTOR 50V,0,1A,0,5W 300mhz
REPLACEMENT BC 168 / BC 183 / BC 238...
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  #260  
Old 03-03-2018, 02:56 PM
abdou2014 abdou2014 is offline
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MY NEW PDK
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  #261  
Old 03-03-2018, 07:04 PM
Golden Golden is offline
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Nice job!
What results do you have?
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  #262  
Old 03-04-2018, 07:30 AM
abdou2014 abdou2014 is offline
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I can not test it now, it's snowing
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  #263  
Old 03-05-2018, 05:27 AM
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GOLDEN LILLY GOLDEN LILLY is offline
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congrats Abdou for your PDK...Your pcb seems familiar...Good Luck!!!
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  #264  
Old 03-05-2018, 06:23 PM
abdou2014 abdou2014 is offline
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Thank you my friend
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  #265  
Old 03-05-2018, 11:57 PM
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Originally Posted by abdou2014 View Post
Thank you my friend
The look is very nice my congratulation

https://www.youtube.com/watch?v=3sSlZF9-KjY

https://www.youtube.com/watch?v=-z-dNMMNN2s

You can find there more details in Arabic language
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  #266  
Old 03-06-2018, 08:01 AM
abdou2014 abdou2014 is offline
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Thank you my Brother, I'm glad you came back to the forum
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  #267  
Old 03-11-2018, 12:06 PM
abdou2014 abdou2014 is offline
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Hi everyone, I did test with my PDK and I want to have your opinion because I do not have much experience with it ,
I had a compass effect but the LED lights up on east and west direction , is this result positife?
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  #268  
Old 03-12-2018, 02:44 PM
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GOLDEN LILLY GOLDEN LILLY is offline
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Compass effect is present when the lrl is at maximum sensitivity. This is normal for an lrl. Lower the sensitivity and search from north to south direction. If compass effect still present even you lower the sensitivity, try another coil like changing coil thickness to smaller size. Big coil wires is susceptible to receive stray electromagnetic feilds including lightning discharges a hundred miles away and that what happens to my pdk.Changing wire thickness will do the trick.
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  #269  
Old 03-12-2018, 03:40 PM
abdou2014 abdou2014 is offline
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The compass effect is only in the east-west direction, and when I reduce the sensitivity it disappears, the coil measures 10 cm .
how to work with the PDK, make a horizontal or vertical movement or just facing south without moving hand ?
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  #270  
Old 03-12-2018, 09:23 PM
abdou2014 abdou2014 is offline
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???
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  #271  
Old 03-16-2018, 07:39 PM
Biek Biek is offline
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Greetings to you, Nicholas! Help? what frequency to use when searching in Ukraine? best regards Biek
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  #272  
Old 04-07-2018, 01:45 AM
perzo perzo is offline
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HI:ncolas what is frquency in iran?
regards
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  #273  
Old 04-07-2018, 01:48 AM
perzo perzo is offline
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HI:NICOLAS Would you use the frequency of the local transmitter?
Regards
PERZO
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  #274  
Old 04-07-2018, 02:56 AM
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HI:ncolas what is frquency in iran?
regards
Hello

Really i not try there but you can ask at member Rezavir from Iran

Normally the frequency is between 40khz to 130khz
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  #275  
Old 04-07-2018, 02:58 AM
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HI:NICOLAS Would you use the frequency of the local transmitter?
Regards
PERZO
Of course for Pdk yet becuse is passive receiver only
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