duhvoodooman wrote:
For the most part your soldering looks pretty good. I see a few joints that look like they should be re-flowed with a hot iron. Basically, any joints that are blobby, rough, dull, or irregular in shape should be touched up. You want to get that smooth, shiny, conical "Hershey kiss" shape to them. I would also recommend trimming any protruding component lead ends or wire ends down as close to the top of their solder joints as possible, since these can cause shorts.
Another thing you could try is checking the DC voltages on the op amp pins & all of the transistor legs and report them here. The distortion sounds like it could be a badly mis-biased transistor. BTW, are you sure that you got the one different transistor (2N5457) in the correct spot?
If those things don't help, then I think you're probably looking at needing to go through the build with a
signal tester to pinpoint where the signal is picking up that nasty distortion.
I think I see the few odd shaped solder points. Just touching them with the iron until they melt and re-shape should fix them?
Also is it pretty much certain that the problem lies within the PCB? I was going to redo the input and output jacks but I don't want to touch them if it isn't necessary.
I'll also check the position of the different transistor.
I have a multimeter...what's the easiest way for me to find where the problem might be?
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