Messages

They are not

I am having problems with this 18v build as well, but I am getting no sound whatsoever.  Thanks for the q1-q5 voltages, I will compare them to mine tonight.

I also have a low voltage on leg 1 of ic7.

Sent from my SM-G920V using Tapatalk

Mine is a 9V build.
Did you see this? http://www.madbeanpedals.com/forum/index.php?topic=21849.msg203582;boardseen#new

[5. 4.9V]

Hello,

I built a 2015 Collosalus and it's definitely doing something, but I wouldn't call it flanging. It affects the sound, but it doesn't move. I'm powering it via my bench power supply at 8.95V.




Voltages on paper in red:


IC1:
1. 7.4
2. 7.26
3. 7.03
4. 0
5. 4.9V
6. 7.27
7. 7.27
8. 14.73

IC2
1. 7.35
2. 7.35
3. 7.04
4. 0
5. 7.28
6. 7.35
7. 7.35
8. 14.72

IC2
1.
2. 6.9
3.
4. 0
5. 7.56
6. 7.62
7.
8. 14.72

IC4
1. 8.05
2. 8.04
3. 7.48
4. 0
5. 7.03
6. 7.35
7. 7.4
8. 14.72

IC5
1. 14.72
2. 0
3. 14.72
4. 14.71
5. 0
6. 14.71
7. 0
8. 0

IC6
1. 0
2. 0
3. 12.53 - 13.89
4. 0
5. 0
6. 0
7. 0
8. 14.72
9. 14.72
10. 6.6 - 9
11. 14.71
12. 12.55 - 13.89
13. 14.72
14. 14.72

IC7
1. 16.2
2. 0
3. 14.7

IC8
1. 1.14
2. 4.57
3. 0
4. 3.8mv
5.
6. 2.34
7. 1.46
8. 9V

IC9
1. 13.8
2. 0
3. 1.34
4. 1.51
5. 0
6. 0
7. 10
8. 10

Q1 BC549C
C. .5
B. .52
E. 0

Q2 BC549C
C. 7-9.7
B. 1.8
E. 1.3

Q3 BC549C
C. 1.2
B. .6
E. 0

Q4. 2N5087
C. 13.7
B. ~9.6
E. 9 - 9.

Q5. BC549
C. 14.2
B. 13.7-14
E. 7-9

Hello,
I have built a slow loris and it is mostly working, but not 100%. Clean bypass works, and one of the distortion modes works. In diode 4,5 (1N914) mode, I get distortion and everything works. But when i flip the switch to select LED mode, the entire circuit grounds out. I am listening via a probe, and I can hear distorted signal on one side of each of the 1N914 diodes, and on both sides of each LED.
Other notes:
I believe it is the 1n914 circuit working and not the LED circuit because the LEDs don't light up with signal present.
I have switched-out the switch and there is no issue there.
I am using the small bear 3pdt switch pcb.

Any clues?
Thanks!

Has anyone else had this issue - can anyone point me in the right direction?

Hello,

I am trying to use an old transistor checker chassis as the enclosure for an FX pedal, and I'm hoping to use the lamp as the LED.

Unfortunately both original cables are green, there's no part number I can find on the lamp, and I haven't been able to dig up a schematic for the transistor checker.

Any clues as to which terminal is positive and which is negative?

The transistor checker ran on a D cell, so I assume it's a DC circuit.

Thanks!

I triple checked it and it is in the right way, following the PCB (flat edge facing in, round side facing out). Any other ideas?

Thanks so much lincolnic. I broke out the multimedia, and there is no short to ground from power that I can find.
I checked the continuity on the 3PDT daughter board and it's good.
I built an audio probe and started checking and I had audio until I hit Q1, a 2nN5088. I replaced it with a 2N3904, which I read could be a replacement, and I didn't have a spare 2N5088. Still the same issue.

Yup - I changed to that. Do you think I fried the pedal by having it in the other orientation? 9V seems like a small amount of voltage.

Anyway - switch is now correct, but I only get signal when bypassed, the LED doesn't work (since I boxed it) and there is no sound when the effect is engaged (since I boxed it). When engaged - on my input device (a UAD apollo) I can see the input meters on the Apollo go high and clip, but there is no audio, so I must have voltage hitting the output, right? They hang there at full/clip.

Update: unsoldered the switch and turned it 90 degrees, so the horizontal lugs of the switch are in line with the length of the pcb. Still the same issue though, bypass works, but no sound when engaged.

Dc jack and inputs are star grounded.

Led isn't working now, it worked when it was a module in a rack.

project: pork barrel chorus
Problem : only bypass works no sound when engaged
Steps: Worked before I boxed it and wired the switch

Well this is embarrassing. Normally I build modular analog synth modules, and if have a high success rate. I first built this project into a modular panel, but decided to move it to a stomp box, since I need to run synth signals through a remap box anyway.

The circuit worked great in the rack, but after buying some small bear pcb switches and wiring it up, I now only get signal when bypassed, no sound when the effect is engaged. Led doesn't light either. I'm new to stomp ox switches, and I assume the issue is there.

Pics attached. Any advice? Do these switches have orientation?