The Voltages Thread (Hopefully)

[RobA]

I brought up the idea a bit ago of having a dedicated thread for known good voltages for the projects. It seemed at least some folks thought it might help, but then I got sidetracked and it went to the back of my mind. Anyway, I still think it could be a useful resource and I just happen to have to voltages for my Stage Fright (which by-the-way, I love) sitting at hand, so here goes.

Stage Fright:

Supply voltage in: 9.4

IC1: (TL074)
1   4.67
2   4.67
3   4.25
4   9.33
5   4.64
6   4.65
7   4.65
8   4.67
9   4.64
10   4.55
11   0
12   4.62
13   4.65
14   4.64

IC2: (TL062)
1   Moving (.69 to 8.7)
2   4.65
3   2.8 to 6.5 or so
4   0
5   4.69
6   4.68
7   3 to 6 range
8   9.35

IC3: (NJM13700D)
1   1.16 to 1.27
2   0.291
3   4.57
4   4.57
5   5.72
6   0.31
7   5.6 to 5.78
8   4.58
9   4.59
10   5.64 to 5.7
11   9.16
12   5.63 to 5.73
13   4.58
14   4.58
15   0.38
16   1.13 to 1.27

IC4:
1   1.12 to 1.3
2   0.286
3   4.61
4   4.61
5   5.72
6   0.3
7   5.61 to 5.78
8   4.58
9   4.56
10   5.66
11   9.15
12   5.58 to 5.69
13   4.58
14   4.58
15   0.317
16   1.14 to 1.28

IC5:
1   1.11 to 1.3
2   0.29
3   4.63
4   4.61
5   5.64
6   0.4
7   5.68 to 5.75
8   4.58
9   4.60
10   5.75
11   9.23
12   5.60 to 5.76
13   4.62
14   4.61
15   0.363
16   1.14 to 1.28

Q1:  (2N3904)
E   3.90 to 3.98
B   4.56
C   9.14

Q2: (2N5457)
G   0
S   1.184
D   3.90 to 3.98

Q3: (2N3906)
E    4.56
B   3.90 to 3.98
C   1.13 to 1.38

[GermanCdn]

Great idea.  And nice job starting with the build that is my white whale, I have successfully f'd up three stage frights with the fourth on the way (two were me trying to  make things "better", and one's possessed).

[muddyfox]

I'm feeling pretty good about my Doppelganger. It's Ian/AlanP's 2.1d board.

-all ICs TLxxxCN
-all LEDs light up the same intensity
-rates on 1 o'clock
-spans, color, blend maxed
-square, slow to the right
-antiphase, true up
-phase on (I think  )
-one lfo (green LEDs light in unison, I suppose that's one lfo?)

Source: 9.33

IC1 (TL074):
1-3: 4.29
4: 8.59
5: 3.8-5.2
6: 3.7-4.6
7: 3.6-4.7
8: 2.7-6.8
9: 3.8-5.2
10: 3.27-5.5
11: 0
12: 3.16-5.63
13: 3.6-5.3
14: 2.1-7

IC2 (TL072)
1: 3.7-4.5
2: 3.7-4.9
3: 3.8-5.2
4: 0
5: 3.8-5.1
6: 3.8-5.2
7: 3.8-5.2
8: 8.6

IC3 (TL074)
1-3: 4.1
4: 8.1
5: 4.0
6: 4.1
7: 4.1
8: 4.1
9: 4.1
10: 4.0
11: 0
12: 4.1
13: 4.4
14: 4.1

IC4 (TL072)
1-2: 4.1
3: 3.3
4: 0
5: 4.1
6: 4.1
7: 4.1
8: 8.04

[oldhousescott]

Maybe a mod could sticky this so it gets more views and posts.

[copachino]

can someone post a SHO voltages??

[wgc]

might be worth creating a google spreadsheet or something that is linked to a sticky?

[muddyfox]

Rob, what are the pots positions that yield those voltages? Everything dimed?

[RobA]

Great idea.  And nice job starting with the build that is my white whale, I have successfully f'd up three stage frights with the fourth on the way (two were me trying to  make things "better", and one's possessed).

Maybe the new one will play nice and go together easily. If you don't mind telling, what were you working on to make it better? I've put the CV control connections in mine, but haven't gotten around to doing anything with it yet.

Rob, what are the pots positions that yield those voltages? Everything dimed?

It's been a bit since I took them and I can't remember where I had it set. If it's like I normally do, then it would either be with both at noon, or with "balls" at noon and "speed" at zero.

Mine also has the Univibe mod caps in there right now, but I doubt that'll change the voltage readings.

[RobA]

I've finished up my Harbinger build and took the measurements for the voltages, so here they are. A few notes, I've subbed for most of the transistors, BC550, BC517, and a FJN598J for the JFET. The oscillator pair are 2N5088 though. I've got it done with the filter board as I'm using an 18V brick to power it. The readings were taken with the Intensity all the way up and the gain trimmer in the middle. I don't actually know where the offset trimmer is because I've got a multi-turn trimmer in there and I can't see where it's at. ~ ==> oscillating.

Voltage in 17.48
Voltage at regulator output 14.69

Q1: BC550
E:   1.05
B:   1.44
C:   2.14

Q2: BC550
E:   1.55
B:   2.14
C:   4.33

Q3: BC550
E:   3.74
B:   4.33
C:   13.62

Q4: BC550
E:   5.16   
B:   5.54
C:   17.5

Q5: BC550
E:   4.55   
B:   5.15
C:   12.94

Q6: BC550
E:   5.15
B:   5.54
C:   17.49

Q7: BC550
E:   4.55   
B:   5.15
C:   12.94

Q8: BC550
E:   5.13
B:   5.52
C:   17.49

Q9: BC550
E:   4.53   
B:   5.13
C:   12.95

Q10: BC550
E:   6.48
B:   6.98
C:   17.48

Q11: 2N5088
E:   8.1 ~
B:   7 ~
C:   14.69

Q12: 2N5088
E:   7.54
B:   8.1 ~
C:   14.69

Q13: BC517 Dependent on trimmers
E:   4.5 ~
B:   8.5 - 11
C:   oscillating around 5

Q14 FJN598J
G:    9.4mV
S:    326mV
D:    17.49V

[Cortexturizer]

this is a fantastic thread!

[RobA]

I took the readings on my Naughty Fish to put up in another thread, so I figured I should drop them in here.

Mine's the 2014 version. I don't think that'll make a difference.

Pots are both at 12:00. Toggles are set to LP, Down, Hi

The input voltage is at 9.25V

IC1:   
   1   0V
   2   0V
   3   0V
   4   -8.23V
   5   0V
   6   0V
   7   0V
   8   8.66V
IC2:    
   1   ~80mV drifting
   2   22mV
   3   22mV
   4   -8.25V
   5   3.44V
   6   2.57V
   7   6.48V
   8   8.66V

IC3:
   1   0V
   2   0V
   3   0V
   4   -8.25V
   5   0V
   6   0V
   7   0V
   8   8.66V

IC4:
   1   1.37V   
   2   4.62V
   3   0V
   4   -3.88V
   5   -8.24V
   6   2.55V
   7   1.41V
   8   8.66V

Vactrol 1:
   1   6.48V
   2   4.93V
   Resistor side both pins at 0V

Vactrol 2:
   1   6.48V
   2   4.93V
   Resistor side both pins at 0V

If a voltage read less than 1mV, I put it at zero.

[selfdestroyer]

Pork Chop Suey Cider

Voltages:
Q1 2N7000
G 6.8v
S 8.2v
D 9.1v

Q2 2N2484
C 4.1v
B 1.2v
E 0.6v

Q3 2N2484
C 4.8v
B 2.2v
E 1.6v

Q4 2N2484
C 4.2v
B 4.8v
E 9.1v

Q5 2N2484
C 2.2v
B 1.2v
E 0.6v

Q6 2N2484
C 4.8v
B 2.2v
E 1.6v

Q7 2N2484
C 9.1v
B 4.8v
E 4.2v

IC1 LF353P
1 4.5v
2 4.5v
3 4.5v
4 0v
5 4.5v
6 4.5v
7 4.5v
8 9.1v

IC2 LM388P
1 4.5v
2 4.5v
3 4.5v
4 0v
5 4.5v
6 4.5v
7 4.5v
8 9.1v

[RobA]

And since I'm on autowahs, here's the voltages for my Autobahn.

All knobs at 12:00

Vin = 9.22V

Regulator:
   Vout   5.04V
   Gnd   0V
   Vin   8.46V

Q1
   G   3.85V   
   S   4.40V
   D   8.55V

Q2
   E   0.287V
   B   0.35V
   C   5.04V

Q3
   E   1.68V
   B   0.287V
   C   5.04V

IC1:
   1   4.23V      14   4.23V
   2   4.23V      13   4.23V
   3   4.22V      12   4.23V
   4   8.56V      11   0V
   5   4.23V      10   4.23V
   6   4.23V      9   4.23V
   7   0.465V    8   4.11V

IC2:
   1   1.68V         16   1.68V
   2   151mV (unstable)   15   160mV (unstable)
   3   4.23V         14   4.23V
   4   4.23V         13   4.23V
   5   5.42V         12   5.42V
   6   0V              11   8.56V
   7   5.42V         10   5.42V
   8   4.23V         9   4.23V

[selfdestroyer]

Third Eye Pedals Muff Gun

Voltages:

Q1
C 4.2v
B 0.8v
E 0.2v

Q2
C 4.1v
B 0.6v
E 0.0v

Q3
C 4.6v
B 0.5v
E 0.1v

Q4
C 4.6v
B 0.7v
E 0.1v

Q5
C 5.8v
B 1.5v
E 1.0v

[selfdestroyer]

Grind Customs FX TSM680 MK2

Voltages:

Q1
C 3.9v
B 0.6v
E 0.0v

Q2
C 5.6v
B 0.5v
E 0.0v

Q3
C 3.7v
B 0.6v
E 0.0v

Q4
C 5.2v
B 1.7v
E 1.1v