- Dec 22, 2017
Hey, guys and girls. Is there any way how to use Serpent Audio quad VCA (got mine pair as a gift) in regular GSSL build? What needs to be cut or changed? SOS
Thanks! I’ve found a bad solder on the pcb and and I’ve replaced a bad tl074. Now the sound comes in and goes out but it doesn’t compress. On the control board the only pot that works is make up gain and even the meter is not moving.Check for correct orientation of op amps.
Feed a steady signal into the unit. Could be from signal generator or just a single note held on a loop from your DAW, but not music . Then measure AC between ground and input pins 2 and 3. Then take schematic and follow signal, measuring at all nodes on the way.
Thanks! I’ve found a bad solder on the pcb and and I’ve replaced a bad tl074. Now the sound comes in and goes out but it doesn’t compress. On the control board the only pot that works is make up gain and even the meter is not moving.
The bypass seems to work.
What may I check to find a solution?
Hi Gustav thanks for your reply, actually I'm not expert. I followed this scheme but I didn't wire the led this way yet. I'm supposing that it's working because when the bypass is in off position the makeup gain works instead when I turn the switch in on position the gain is not working anymore. For this bypass I wired a 3pdt On-off-On that I had in stock. Do you think this could be the problem?You write that the bypass seems to work, but to make sure that you do not have a miswired bypass causing the problem (symptoms fit), could you share the reasoning behind the conclusion?
Hi guys good news here! The biggest part of problems was created by 2 solder joints touching each other and by poles inverted on meter. Now it compress!
However since I’ve never used a real G compressor before I have a doubt.
when threshold goes on positive values (expander) the meter is not moving and knobs on command board don’t seem to affect the sound anymore.
Is this a normal behavior or is a new issue?
Please forgive me for my boring questions.