Analysis this schematic

[mohandes]

ok
this is my photos

[mohandes]

another

[mohandes]

[mohandes]

Hi to all
i take photo and need your help?what is my wrong?please
my problem in bd140,pin3 ne555 i have-10.35v but it should be 10v(i think), drain of irf740 600v by oscilloscope & any my ? in last numbers.
thank you

[georgi.g.zhelev]

Hi to alli take photo and need your help?what is my wrong?pleasemy problem in bd140,pin3 ne555 i have-10.35v but it should be 10v(i think), drain of irf740 600v by oscilloscope & any my ? in last numbers.thank you

Give me picture to signal pin 6 NE 5534 (NO 5532!!!)

[georgi.g.zhelev]

PS-G

See diagrams.

[mohandes]

ok and hi georgi
tomorrow i again go to my collage and check by oscilloscope.i put for you pin6 lf357(instead of ne5534 ,correct it?)
when i measure drain of irf740 by multimeter i can change the value of drain and pin6 lf357 by potentiometer 100k As follows:
1-drain irf740 -0.36v ,pin6 lf357 become 6.05v
2-drain irf740 -1.21v, pin6 lf357 become 5.17v
3-DRAIN IRF740 -0.7v , PIN6 LF357 BECOME 5.71v
ok i think i adjustment on number3 and it is ok but why i get in oscilloscope -11.6v??????
why my result is negative?
and the out put x,y,z correct?
thanks

[mohandes]

this is lf357 if it is not correct tell me to buy NE5534,it is my problem because i should go to other city and buy it

[porkluvr]

this is lf357 if it is not correct tell me to buy NE5534,it is my problem because i should go to other city and buy it

You need to use NE5534. LF357 will not work correctly in this circuit.

[georgi.g.zhelev]

LF 357 ( slew rate = 50 V/мks) works better than 5534 (from my experience).OPEN YOUR EYES , read carefully !! Ofset (trimer 47k) LF 357 ...pin 1 >pin5 ; NE 5534 ofset pin 1 >pin 8 , setting : pin 6 =-0,2V (no target to coil !)

[porkluvr]

Georgi, if that's the way you feel about it, then why does the Pulse Star schematic show the NE5534 being used, and with an offset-null scheme that would NOT work with the LM357?

I think my eyes are open but I question whether yours are.

[mohandes]

LF 357 ( slew rate = 50 V/мks) works better than 5534 (from my experience).OPEN YOUR EYES , read carefully !! Ofset (trimer 47k) LF 357 ...pin 1 >pin5 ; NE 5534 ofset pin 1 >pin 8 , setting : pin 6 =-0,2V (no target to coil !)

Hi georgi
thanks,i repair that.i adjustment that by potentiometer 47k ,but i think have ripple in pin6 lf357 because have -0.2to -0.22v, can i waiver this ripple?
and in my photos i write wrong about name of output but now when i adjustment the lf357 have 5mv for x , 167mv fory , 160mv for z correct?
if you dont guide me i can not repair that .
and in pin 3 555 ihave -10 volts and correct that?

thanks

[georgi.g.zhelev]

Georgi, if that's the way you feel about it, then why does the Pulse Star schematic show the NE5534 being used, and with an offset-null scheme that would NOT work with the LM357?

I think my eyes are open but I question whether yours are.

Hi,porkluvr! SОRRY. (#25 )this is not about you, it's about mohandes .sorry for the mistake ,excuse me.ОК?

[porkluvr]

Hi,porkluvr! SОRRY. (#25 )this is not about you, it's about mohandes .sorry for the mistake ,excuse me.ОК?

You've got your hands full. Apology accepted.

Just let me say this, for what it's worth...
There .... Is .... Noooo ..... Hope!

[mohandes]

Hello georgi
why when i adjustment other potentiometer pin6 lf357 have variable value?????for example when i adjustment potentiometer 100k and potentiometer 10k(delay) and potentiometer 50k output change?
and in pin 10 U3(453 i have Fixed value and it -1.6mv?