SNIFFER XR-71

[Qiaozhi]

where are the power supply?

I think your hoody is obscuring your vision.
It's in the bottom left of the schematic.

[paulo theodoro]

hi All.
the schematic, revised by Vladimir Demchenko. your comments if you see mistakes will be greatly appreciated.

where are the power supply?

[Geo]

At XR71 T8 is PNP (I don't know if it is OK)

[kt315]

hi All.
the schematic, revised by Vladimir Demchenko. your comments if you see mistakes will be greatly appreciated.

[dan129]

hi geo, could you send to me pcb schematic of XR71. Also components list and some eventuals tips. I want to try to build it. thx

[email protected]

can you send me pulse star 1 and 2 s shematic or add here
we didn't understand to IC name

please send me
[email protected]

[Geo]

XR71 and Delta Pulse are almost the same - true. Unfortunately both share same errors - 2 values in the circuit aren't correct (dumping resistor and one other in the ground ballance part). Only tracing the original XR board can show the exact values.

Hi GTK. Damping resistor is 2k2. Who other resistor would you like:confused: ? I have the original XR71. Eric Foster gave it to me. I checked with one who i made before 2..2.5 years and it is exactly the same.

[GTK]

XR71 and Delta Pulse are almost the same - true. Unfortunately both share same errors - 2 values in the circuit aren't correct (dumping resistor and one other in the ground ballance part). Only tracing the original XR board can show the exact values.

[Geo]

Hi all,
In xr71p R36 is 1k and R37 is 12k,
But in XR-71 R39 is 1k and R40 is 12k.
Which one is correct?

Hi .All are right.XR71 and XR71p is the same. R36 and R37 are for XR71p. R39 and R40 are for Delta Pulse.Q7 at xr71 (PNP) is Q8 at Delta Pulse (NPN). Xr71 has Auto and manual. Delta pulse has only Auto. XR71 runs at 400Hz and Delta Pulse at 100Hz. All the other are exactly the same. Very good and stable detector. Construct it.
Bye

[1843]

Resistors

Hi all,
In xr71p R36 is 1k and R37 is 12k,
But in XR-71 R39 is 1k and R40 is 12k.
Which one is correct?

[1843]

XR71

[quote=pcbetcher;45377]Hi,
aban, could you please send me XR71 protel99se 's file?
Thanks in advance.


I need it too,
Thanks

[1843]

[quote=pcbetcher;45377]Hi,
aban, could you please send me XR71 protel99se 's file?
Thanks in advance.


I need it too,
Thanks

XR71

Hi,
aban, could you please send me XR71 protel99se 's file?
Thanks in advance.

My e-mail: [email protected]

pulse star

hi
Any body knows about making coil for pulse star 2?


thanks

yours taj

[hunterq3]

hi aban

I want to XR71 protel99se 's file.could you sent this file, please? thanks

e-mail:[email protected]