LM317K regulator current problem

[audioguru2]

Would an LF411, LM318 or the OP07C work here, I don’t have any MC34071?

The LF411 is good, the LM318 is rated for a 40V supply but has diodes across its inputs that might messup the circuit during over-current and the OP07C is ordinary but with an excellent very low input offset voltage not needed here.
I was thinking all afternoon about the TI chip I mentioned in the 0V-30V project and remembered it now, their TLE2141 is perfect.

Will I see a schematic of your mod? 8)
Please?

I'll pass on the details but I would use an LM337Z negative regulator to provide a -1.25V to the circuit where most things are grounded now. Even opamps that have inputs that don't work at their negative supply can be used. ;D

 

[ante1]

Thanks, that sounds promising!  ;D

 

[gogo2520]

Hello
  I have been looking at this circuit for awhile and the only thing I don't under stand about the LM301 is Pin 7 VCC which would be what. The output power of the LM317 or the input power.
                                Thanks
                                gogo

 

[gogo2520]

I fond the answer, The vcc+ would come off the output of the lm317. But according to the data sheet of the LM301 the max input voltage is 22volts so how can it work if the LM317 is produceing 30 volts?
                                    Thank You
                                      gogo