Full m/lab SD2000 schematics

[N@SKO]

Hi N@sko
what about lm394 - are you replasement

Lm394 replace with Ad797,use pic fot pusle.On video detector use sd2100 timing.Shalow target is iron,deep target is 20 eurocents at 25 centimeters in low mineralised ground.

[serci78]

Congratulations nice work N@SKO

[plboy]

Hi N@sko
what about lm394 - are you replasement

[N@SKO]

Hi N@sko th for the fast reply.
Where you connected pin 11 and pin 7 of CA3083...collector and emiter of the tranzistors are free?

Pin 11 and pin 7 are free,using transistor as a diode!!!!

[greylourie]

Zed's schematic is correct,not need to be changed! my copy of SD2000 work good with CA3046.
https://youtu.be/VNNAE5kCrvs

Bravo ! Very nice Mylap detector.

[plboy]

Hi N@sko th for the fast reply.
Where you connected pin 11 and pin 7 of CA3083...collector and emiter of the tranzistors are free?

[Bill512]

very nice work N@sko...
There are two different sets of pcb's?

[N@SKO]

Hi All I need from some help for SD2000
Switch for channel 1 and 2 where is connected to pin 2 of CD4011 maybe it need to connect to pin1?
About Audio with CA3083 why pin11 /Emiter of Q4/ and pin7/Collector of Q3/ not connected?
Can I replace CA3083 with CA3046?

Zed's schematic is correct,not need to be changed! my copy of SD2000 work good with CA3046.

https://youtu.be/VNNAE5kCrvs

[plboy]

Hi All I need from some help for SD2000
Switch for channel 1 and 2 where is connected to pin 2 of CD4011 maybe it need to connect to pin1?
About Audio with CA3083 why pin11 /Emiter of Q4/ and pin7/Collector of Q3/ not connected?
Can I replace CA3083 with CA3046?

[external9]

tnx N@SKO , but tx or dvt puls is Wrong !please Program or genocide line Correction tnx

[N@SKO]

Proteus 8 files

[N@SKO]

Use Mario's pic of pcb to trace sd2100 timing generator .Only have no idea where to connect pin1 74nc273 to control "reset"

[serci78]

Thanks Serci78 - how about one in a TO-92 package?

I was leaning towards this one - ZTX618

http://au.element14.com/diodes-inc/z...ine/dp/9526528

It looks good

[detectormods]

They could of rebuilt it as a top notch detector, but no, NE5534 front end? Preceded by lossy ZVP and VN (gated resistors ) Mosfets. Could of added Fet switched damping and a bloody microprocessor to handle all the functions.. Why rehash a 25 year old design?

[N@SKO]

Sd2000 pcb

http://qhdzw.com/product/html/234.html