Issue with GGG BSIAB2 Build

[Juan1]

Hello everyone.  I'm having an issue with a pedal I'm building for someone that I've built before without issue.  The BSIAB2 works, but lacks some gain compared to my other BSIAB.  The values of the Q1, Q2, and Q5 are in spec, but the following aren't:

Q3D: Moves around, but settles around 8V. Directions call for 4.3V.
Q4S: Same story.

Q3D and Q4S are on the same trace, along with one side of C7, and one side of C12.  On the transistor side those four connections all move around, but settle around 8V.  The other side of C7 is correct at 4.3V, and the other side of C12 is correct at near 0.  The transistors have all been swapped, and the issue persists.  What am I missing?  Here is the schematic, and here is the board layout.

So what am I missing? Where did I screw up? Thanks!

[antonis]

For DC check measurements only, try to directly short Q3's Gate to GND..

[PRR]

"R10"-- and what it connects to? Voltages? Solder quality?

Sure it isn't 120k? (One of my favorite mistakes.)

[Juan1]

For DC check measurements only, try to directly short Q3's Gate to GND..

That yields a stable 8.48V from Q3D. 4.5V or so is the desired reading.

"R10"-- and what it connects to? Voltages? Solder quality?

Sure it isn't 120k? (One of my favorite mistakes.)

I double checked, and I'm reading 116 ohm.  I like using 1-1.5k on this pedal, but this pedal isn't for me.  I've resoldered.  The drain reads are:

Q1: 4.30 (In spec)
Q2: 8.48 (Spec is 8.0)
Q3: 8.48 (Spec is 4.3)
Q4: 8.00 (In spec)
Q5: 4.30 (In spec)

I could only get Q5D down to 5.0V with the 100k trimmer, so I used a 200k trimmer instead.

[antonis]

May we see some pics of your build..??

Although Q2 & Q4 Drains should stand at the very same voltage, I suspect a short across Q4..

[Juan1]

Short answer:
There was no continuity between R11 + R12 and Q4, which should connect per the schematic.  I soldered the joints together to replace what must have been a broken trace, and all is right with the pedal!

Long answer that includes my process:
I noticed that the high voltage readings only occurred when Q4 was present. Remove Q4 and the high voltage went away.  Then I checked continuity of every neighboring solder joint with every nearby higher voltage path on the board. Everything was fine, no unintentional solder joint connections.  Finally, I checked the continuity of Q4 with neighboring resistors and caps, and that's where I found my problem.  G on Q4 should be on the same trace as one side of R11 and R12.  Perhaps my soldering iron was too hot and it damaged the trace.  I connected the solder joint of R11 to Q4G, and there was much rejoicing when excessive distortion rang out through the room.

I appreciate everyone's help!