Neovibe built, but no dice...voltages.

[scalefreak]

Ok, guys...I have the following voltages with no sound and no light. I know the voltages at q13 are way out and I have reflowed all joints, checked all components. I am pulling my hair out. The only deviation from RG's schematic is that I have used a 20vdc supply and sent power directly over to where the diode bridge would have dumped it in via jumpers and omitted the bridge. The PCB is his as well. Thanks for any advice!  

Q1
C 1.93
B 1.292
E 0.935

Q2
C 4.5
B 1.93
E 1.49

Q3
C 10.47
B 4.51
E 3.88

Q4
C 14.8
B 4.76
E 4.4

Q5
C 11.09
B 4.41
E 3.72

Q6
C 14.8
B 4.74
E 4.4

Q7
C 11.04
B 4.43
E 3.76

Q8
C 14.8
B 4.68
E 4.3

Q9
C 11.2
B 4.31
E 3.62

Q10
C 14.8
B 5.92
E 5.41

Q11
C 20
B 9.13
E 11.42

Q12
C 20
B 11.42
E 10.74

Q13
C 19.79
B 5.38
E 4.80

Q14
C 20
B 0
E 14.8

[scalefreak]

Ok, I have sound now...very clean, but no light. The sound was due to wiring the 3pdt up wrong. I notice a slight change in the color when I flip the chorus/vibe switch, but no oscillation and judging by my voltages I am assuming that the lfo is not starting. That still doesn't answer the light question though.

[scalefreak]

I guess I should also note that I used all 2n5089's except for a 2n3904 on the bulb driver.

[R.G.]

By "Q14" do you mean the 15V voltage regulator?

Just offhand, I'd say that the emitter to ground on Q13 is open or very high resistance. Use your ohmmeter from the actual transistor pin to a ground pin somewhere else. Does it match the resistance of the fixed resistor plus pot in the emitter of Q13? Or is it very high resistance?

[scalefreak]

I get 9.8k. Which resistor should it match? Yes on the Q14 reg

[R.G.]

I get 9.8k. Which resistor should it match? Yes on the Q14 reg

I think you've found your problem. This shouldn't be more than about a couple of hundred ohms max. What pot and fixed resistor do have there, and what do they actually READ with the ohmmeter.

[scalefreak]

I think you've found your problem. This shouldn't be more than about a couple of hundred ohms max. What pot and fixed resistor do have there, and what do they actually READ with the ohmmeter.

I read that wrong last night. It is no higher than the the trim pot plus resistor and changes when I adjust the trimmer. I have a 67.2 ohm resistor and 500 ohm trimmer there.

[R.G.]

I read that wrong last night. It is no higher than the the trim pot plus resistor and changes when I adjust the trimmer. I have a 67.2 ohm resistor and 500 ohm trimmer there.

Turn that trimmer down until the resistance across both the 67 ohm and the 500 ohm is 68 +/- ohms. Then try your voltages again. If the collector is still at about 20V, then the bulb is shorted by a solder or board problem, or the path from the bulb to the collector of the driver is open.