Unified Delta Pulse & Sniffer XR-71 schematic

     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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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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Hi dear friends please upload Sniffer xr71 full(pcb+schematic+coil)
Thancks Very Very Much

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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

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hi
what do tp1 and tp2 and .... mean?


Posted on: October 22, 2011, 05:35:35 AM

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		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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