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Offline vourvonTopic starter
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« on: December 03, 2009, 02:53:36 am »
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     The 680 ohm resistor [R6] below the IRF 740 should be 1k ohm resistor . Also on the component layout they are using a 2.2 k ohm damping resistor which is high , the 680 ohm damping resistor on the schematic seems more realistic . They did not use R51 , the purpose of R51 is to reduce current on the IRF 740 if your seach coils DC resistance is less than 2.0 ohms , I see it on the schematic but it is missing on the PCB component Lay-Out , That is why they put the two blue jumpers from IRF740 to the -12 supply . The ST TH1220 is not being used but must be added . So what I am seeing now are just little problems . I need to continue and check the whole circuit . Eugene

 
Eugene
      I get the unified Delta Pluse & Sniffer XR-71 schematic with the PCB lay-out but if verify the correctness of lay-out you found have different in R5 680 1W versus 2.2K 1W, R6 1K versus 680 and if I'm correct I can't see the R50 and R51 also the 10,000uf versus 1,000uf. Which is correct the schematic or the lay-out.

       The ISIS schematic for Delta Pulse 1 potention meter name is Signal, Sniffer XR-71 potention meter name is Sense and Unified DP & S XR-71 potention meter name is Delay if you compare which 1 is correct or it depend what schematic you used but in actual use of this detector there is an difference. Please advise. Thanks.

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« Last Edit: December 03, 2009, 11:17:44 am by Eugene52 »
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Offline ram
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« Reply #1 on: December 03, 2009, 09:54:25 am »
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for me i use this schematic, with modification.

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Offline Eugene52
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« Reply #2 on: December 03, 2009, 11:41:41 am »
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Eugene
      I get the unified Delta Pluse & Sniffer XR-71 schematic with the PCB lay-out but if verify the correctness of lay-out you found have different in R5 680 1W versus 2.2K 1W, R6 1K versus 680 and if I'm correct I can't see the R50 and R51 also the 10,000uf versus 1,000uf. Which is correct the schematic or the lay-out.

       The ISIS schematic for Delta Pulse 1 potention meter name is Signal, Sniffer XR-71 potention meter name is Sense and Unified DP & S XR-71 potention meter name is Delay if you compare which 1 is correct or it depend what schematic you used but in actual use of this detector there is an difference. Please advise. Thanks.
[/quote]

Hello Vourvon . Ram was successful with the schematic and pcb files he used .
To answer your questions Vourvon , download a copy of the Delta zip FINAL file I posted here . Everything should be complete and accurate .
Regards........Eugene

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Offline vourvonTopic starter
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« Reply #3 on: December 03, 2009, 06:41:04 pm »
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Ram,

     Thanks for the answer my attachment came from your previous post so if you use or follow the schematic you modify the PCB lay-out according to the circuit and electronic component indicated in schematic diagram.

Eugene,

     I mean which is I follow the schematic or the PCB lay-out with electronic component value, because the PCB lay-out with electronic component value not follow the schematic and have the difference, my thinking is that the PCB lay-out with electronic component value is already enhance or improve that why have difference in the schematic or vise-versa. Because I have plan to assemble that MD instead I buy twobox I need back-up MD for my Nokta Golden King and later on if assemble unit is success I plan put a arc-geo logger of TW. I work in electronic company and I handle auto-insertion and surface mounting machine and many electronic parts throw by the machine, good parts but cannot feed to machine so every month a have an ave. worth of $1,000 electronic component cannot use, maybe all resistor and capacitor use for assemble MD was came from machine throw. Please advise.

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Offline farah676
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« Reply #4 on: January 10, 2010, 09:01:09 pm »
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Hi dear friends please upload Sniffer xr71 full(pcb+schematic+coil)
Thancks Very Very Much

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« Reply #5 on: January 14, 2010, 08:22:05 am »
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Work in progress...boring ,,,,drilling..got all components x 5
what with this jumper..shall it be on or off ?
what with this jumper..shall it be on or off ?

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« Reply #6 on: May 11, 2010, 03:53:37 am »
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Hi!
I got from Bulgaria the assembled PCB of SR 71 Sniffer and seems well assembled.

There is a shortform for connections, however there are no operating instructions....do someone has those?

Thanks

ILIO Shocked

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« Reply #7 on: May 13, 2010, 04:35:01 pm »
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hi vourvon,
you are right , the PCB lay-out with electronic component value not follow the schematic and have the difference, not yet ................ Angry
 * c1=15nf or 22nf  * c7=220uf or 1000uf * R1=680k or 470k * R5=2k2 1w or 680R 1w * R6=680R or 1k * R47,49=2k or 1k * PR1=200k or 220k..........?
ok Eugen please corect the Delta zip FINAL file for helping peaple and many thanks.......
Regards...raff

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« Reply #8 on: October 22, 2011, 05:58:23 am »
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hi
what do tp1 and tp2 and .... mean?


Posted on: October 22, 2011, 05:35:35 AM
Quote:Posted by vourvon

     The 680 ohm resistor [R6] below the IRF 740 should be 1k ohm resistor . Also on the component layout they are using a 2.2 k ohm damping resistor which is high , the 680 ohm damping resistor on the schematic seems more realistic . They did not use R51 , the purpose of R51 is to reduce current on the IRF 740 if your seach coils DC resistance is less than 2.0 ohms , I see it on the schematic but it is missing on the PCB component Lay-Out , That is why they put the two blue jumpers from IRF740 to the -12 supply . The ST TH1220 is not being used but must be added . So what I am seeing now are just little problems . I need to continue and check the whole circuit . Eugene

 
Eugene
      I get the unified Delta Pluse & Sniffer XR-71 schematic with the PCB lay-out but if verify the correctness of lay-out you found have different in R5 680 1W versus 2.2K 1W, R6 1K versus 680 and if I'm correct I can't see the R50 and R51 also the 10,000uf versus 1,000uf. Which is correct the schematic or the lay-out.

       The ISIS schematic for Delta Pulse 1 potention meter name is Signal, Sniffer XR-71 potention meter name is Sense and Unified DP & S XR-71 potention meter name is Delay if you compare which 1 is correct or it depend what schematic you used but in actual use of this detector there is an difference. Please advise. Thanks.




plz tell me about voltages of test points exactly



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« Reply #9 on: October 30, 2011, 10:53:42 am »
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Hello

I have made the sniffer xr71 on the breadboard ! But I don't know what is this "j1" (attached here) for ? Is it a kind of switch ? Do I have to do any work before turning the system on ?

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