Damnation Audio Parallel Drive Debugging

[Chalkeater]

Hey all. Long time reader, first time caller, looking for some help getting a populated board fully online. I've built a few pedals from kits and one from scratch, so it's very possible I'm missing something obvious here. Here's the R.G. question list, pictures after -

1.What does it do, not do, and sound like?
As described by the guys at Damnation, it's two circuits in one box - a scaled down Tube Screamer style overdrive, and a scaled down Rat style distortion. Volume and gain for each but no tone. The tubescreamer half of the circuit works fine. The Rat half doesn't pass signal, though I can hear the pots scratching and when I crank up volume and gain there's a hum that gets louder.

2.Name of the circuit = Damnation Audio DIY Parallel Drive

3.Source of the circuit (URL of schematic or project) = https://www.dropbox.com/s/l3ofa6xjzwbtbr1/DIY%20BASS%20PARALLEL%20DRIVE.pdf?dl=0

4.Any modifications to the circuit? No

5.Any parts substitutions? No

6.Positive ground to negative ground conversion? No

7.Turn your meter on, set it to the 10V or 20V scale. Remove the battery from the battery clip. Probe the battery terminals with the meter leads before putting it in the clip. What is the out of circuit battery voltage? => I'm not totally sure what this means, but when there's no battery in the circuit and I've got the negative of my meter hooked to groud, the positive side of the battery snap measure 0 and the negative side measures .01.
Now insert the battery into the clip. If your effect is wired so that a plug must be in the input or output jack to turn the battery power on, insert one end of a cord into that jack. Connect the negative/black meter lead to signal ground by clipping the negative/black lead to the outer sleeve of the input or output jack, whichever does not have a plug in it. With the negative lead on signal ground, measure the following:
Voltage at the circuit board end of the red battery lead = 7.94
Voltage at the circuit board end of the black battery lead = 0

Now, using the original schematic as a reference for which part is which (that is, which transistor is Q1, Q2, etc. and which IC is IC1, IC2, C1, and so on) measure and list the voltage on each pin of every transistor and IC. Just keep the black lead on ground, and touch the pointed end of the red probe to each one in turn. Report the voltages as follows:

IC1
P1 = 7.71
P2 = 1.36
P3 = .57
P4 = 0
P5 = 0
P6 = 1.48
P7 = 7.74
P8 = 7.58

IC2
P1 = 3.86
P2 = 3.86
P3 = 3.68
P4 = 0
P5 = 3.39
P6 = 3.55
P7 = 3.25
P8 = 7.72

IC3
P1 = 3.85
P2 = 3.85
P3 = 1.92
P4 = 0
P5 = 3.81
P6 = 3.85
P7 = 3.85
P8 = 7.71



D1
A (anode, the non-band end) = 3.84
K (cathode, the banded end) = 3.84

D2
A = 3.84
K = 3.84

D3
A = 3.84
K = 3.24

D4
A = 3.24
K = 3.84









Thanks in advance for the help, everyone.