Super Regulator

[jan.didden]

Another thing. Did you say the LED at the input current source is not lit?

Jan

 

[buzzforb]

No change after removing c9

 

[jan.didden]

Hmmm. It's not playing along....

 

[jan.didden]

What is Vout of the opamp, at the pin, and then also on the other side of D2?

 

[buzzforb]

From G to pin 6, -.366v. About the same but positive on other side of d2

 

[jan.didden]

Pin 3 to gnd?

 

[buzzforb]

2.58v

 

[jan.didden]

Are you sure Q1 is the right way around? If the base is at almost zero there cannot be 14V at its emitter.

 

[davada]

Starting simple and working back. What would cause a Vdrop of only 3.6V across the LM329dz? I have now tried two different parts from two different orders.

You can pull the part out and test it. Just make up a resistor jig for it and put a voltage across the works.

 

[jan.didden]

And the LED is not on? What is the voltage on both sides of R2?

 

[buzzforb]

It is according to the silkscreen. Led is not on.

 

[buzzforb]

R2 14v/0v

 

[jan.didden]

Can you remove Q2?

 

[buzzforb]

Remove and replace or just remove?

 

[jan.didden]

Remove and replace or just remove?

Just remove. If the LED comes on, careful check the pinout of whatever you used for Q2 in the datasheet, and match it to the PCB.
The PCB stuffing guide will tell you which pin is the C, B or E.

Jan

 

[buzzforb]

Will do. Used bc556bta

 

[jan.didden]

What did you use for Q2?

Can you also measure b of Q1

 

[jan.didden]

Will do. Used bc556bta

Should be OK for pinout.

 

[jan.didden]

Just cut it off and remove the pins with a tweezer; easier on the board.

 

[buzzforb]

Q2 pulled and led lights up. I use that technique in combination with good quality solder braid.