SSSSSmokey
New Head-Fier
- Joined
- Jun 11, 2004
- Posts
- 42
- Likes
- 0
I just finished building my first PPA. My source is a car head unit. I am using a STEPS at 24v to power the PPA. I am using basically the default parts list on Tangents website, except my l/r opamps are OPA637s and my ground opamp is a 627.
I get audio, but it is very low quality. It is extremely quiet and destorted up until about halfway on the volume. At about halfway, it starts crackling and popping and gets very loud quickly.
I am also getting around 20 mV of DC offset (this is from measuring ground to output right?) at 0 volume and up to several hundred with the volume maxed.
I've checked over all my solder joints and don't see any shorts or any problems with the soldering. It just makes me sad to spend so much time on this and now it doesn't even work properly.
What should my first plan of action be? I don't know enough to really troubleshoot this by myself. :-/
I get audio, but it is very low quality. It is extremely quiet and destorted up until about halfway on the volume. At about halfway, it starts crackling and popping and gets very loud quickly.
I am also getting around 20 mV of DC offset (this is from measuring ground to output right?) at 0 volume and up to several hundred with the volume maxed.
I've checked over all my solder joints and don't see any shorts or any problems with the soldering. It just makes me sad to spend so much time on this and now it doesn't even work properly.
What should my first plan of action be? I don't know enough to really troubleshoot this by myself. :-/