Negtive voltage on gate - English Channel ROG

[Pushtone]

I'm biasing an English Channel build.
The effect sounds the way I think it should, no gating, good sustain etc.

But the gate for trasistor Q5 is less than zero at -0.14 .
The ROG page tells me it should be zero.

Should I be concerned with a negitive reading on the gate of Q5?



Here are my pin voltages with an 8.8V supply

Q1:
D: 4.40
S: 0.18
G: 0

Q2:
D: 4.40
S: 0.21
G: 0

Q3:
D: 8.88
S: 4.41
G: 4.40

Q4:
D: 4.57
S: 1.41
G: 0.878

Q5:
D: 4.46
S: 0.02
G: -0.14 (negative??)






Here are the pin voltages from the ROG page with an 9.1V supply

Q1:
D: 4.57
S: 0.174
G: 0

Q2:
D: 4.55
S: 0.164
G: 0

Q3:
D: 9.11
S: 4.79
G: 4.55

Q4:
D: 4.59
S: 1.41
G: 0.878

Q5:
D: 4.61
S: 27mV
G: 0

[Ge_Whiz]

If it sounds okay, no. But you should be measuring relative to the ground, or battery -ve, in which case, you can't measure something negative relative to this. I suspect a problem with the connections for that measurement. When the battery voltage is okay though, everything is all right, so don't sweat.

[Ardric]

Maybe a bad 47n coupling cap from Q4, or a bad 4n7 cap on the cut control?  I imagine a reversed polarized electrolytic in either of those spots could cause the gate to go negative.