PT-80 Delay troubleshooting

[subnormalwater]

Hi, I recently made a PT-80 Delay from GGG (http://www.generalguitargadgets.com/effects-projects/modulationecho/pt-80-delay/) but I can't figure how to make it work properly;

I'm powering it with 18v DC bypassing the charge pump and the pcb is homemade. I checked a trillion times my connections

When in bypass mode everything is fine but when engaged I hear some serious amount of noise and the repeats are very low volume, I only noticed them with maximum delay time.

These are my readings, I already tried swapping all my ICs but the readings are the same:

TL072

Pin 1:   6V
Pin 2:   6V
Pin 3:   6V
Pin 4:   0V
Pin 5:   3V --- the main problem (I think), should be 5.5V and can't figure why it's so low, it's directly connected to Pin 3 & 6 and the resistor values are right
Pin 6:   6V
Pin 7:   6V
Pin 8:   12V


NE571N

Pin 1:    starts at 0.5V then drops to 0.04V --- should be 1V
Pin 2:    1.8V
Pin 3:    1.8V
Pin 4:    0V
Pin 5:    1.8V
Pin 6:    6.62V --- slightly high, should be 6.5V
Pin 7:    6.62V --- same
Pin 8:    1.8V
Pin 9:    1.8V
Pin 10:  6.2V   --- slightly high, sould be 6.0V
Pin 11:  1.76V --- every other pin is fixed at 1.8V, this one doesn't like it
Pin 12:  1.8V
Pin 13:  12V
Pin 14:  1.8V
Pin 15:  1.8V
Pin 16:  0.93V --- should be 1V


PT2399

Pin 1:    5V
Pin 2:    2.5V
Pin 3:    0V
Pin 4:    0V
Pin 5:    2.9V   --- slightly high, should be 2.8V
Pin 6:    2.5V
Pin 7:    0.75V --- slightly low, should be 0.9V
Pin 8:    0.82V --- same
Pin 9:    2.5V
Pin 10:  2.5V
Pin 11:  2.5V
Pin 12:  2.5V
Pin 13:  2.5V
Pin 14:  2.5V
Pin 15:  2.5V
Pin 16:  2.5V


12V regulator

C:  18V
B:  0V
E:  12V


5V regulator

C:  18V
B:  0V
E:  5V

[Digital Larry]

Pin 5 of your op amp should be at 6 volts for sure as you mentioned.  pins 5, 6, 7 should all be at the same DC voltage.  On the other side, 1, 2 and 3 are all at 6 volts which is expected.  Focus in on this area.  Are you measuring the voltages by touching the pins of the op amp or is it in a socket and you're measuring them off the socket?

[subnormalwater]

It is inside a socket and I measure from the socket leads

[subnormalwater]

Update:

I got a MAX1044, I powered it up with 9V and it gave a solid 14-15V on output and all the values were the same as the first post.

The weird thing is that now there is a very loud beep even in bypass mode and when I switch the pedal on, the beep boosts up to ear-rape levels. Tried again with 18V bypassing the charge pump and everything returned to the initial conditions.

Also double checked the pots, no problems.

What does it mean?