I'm pulling my hair out here. I've built and rebuilt this circuit. At first I didn't realize it was bipolar. I was only using one battery.

Now I rebuilt it to be sure and I hook it up. One of the leds in the clean / dirty loop light up when the switch is off.

The +v in diode is heating up and I'm at a loss.

In the mods it says I don't need a bunch of stuff because I'm not using a vu meter only for guitar. So no xlr no +out just - out and pad A is for low level inputs again not needed.

Some questions: on the B sides of the open amp ic2b it has pin 7 and 14 common to the center of c10 and d4,
Pin 14 is the -supply which goes connects to pin 7 which is + supply. Am I missing something cause that seems to be mixing polarity the same goes for ic1b pin 7 and 14 are common and I don't see why.

2nd if r3 -5 and c7 aren't needed do you connect pin 13 to pin 8?

I thought that you would to normalize that output.

Is there something I'm missing? Would a pic of the bread board help anyone?

The schematic is mislabelled. The positive supply goes to pin 14 on both op amps and the negative supply goes to pin 7 on both op amps. Craig's layout in the book is correct.

Anderton used 4136 quad op amps IIRC, which have a totally different pinout.
Edit: Not quad, 14 pin DIP dual.

Quote from: Tubebass on March 11, 2018, 03:17:02 PM
Anderton used 4136 quad op amps IIRC, which have a totally different pinout.
Edit: Not quad, 14 pin DIP dual.

I'm aware of this and have the conversation written down but in the schematic it shows even with the original pins to be hooked up incorrectly.