I finished building the Sunking and am having some problems with it. The gain pot has a very small clean area at the beginning of it's rotation. It then abruptly transitions to pretty major overdrive. The sound of the overdrive is very sputtery as it decays and then the signal cuts off abruptly. There is also a crackly (noise) quality to the distortion. Also, if the strings are hit very lightly, the circuit almost seems not to engage. Hit a little harder and it is full-on. At this point I have replaced almost every part in the circuit and done the usual check for solder bridges. I have tried numerous chips as well. I audio probed the circuit, but in this case I am getting plenty of signal, just not the kind I think anyone would want. It seems to degrade at the gain control. At one point I had the gain pot out and measured around .88k on one and .94k on the other. I reversed the top and bottom pot wiring without much effect. My chip voltages are as follows:
IC1 1. 4.73 2. 4.73 3. 3.72 4. 0 5. 4.73 6. 4.73 7. 8.76 8. 9.44
IC2 1. 4.62 2. 4.73 3. 4.72 4. -9.17 5. 4.72 6. 4.73 7. 8.46 8. 17.29
IC3 1. 9.44 2. 4.67. 3. 0 4. -4.63 5. -9.18 6. 4.88 7. 7.16 8. 9.44
I have tried two MAX1044 with little change.
If anyone has any thoughts on this or experienced similar, save my project. Thanx in advance.
IC1 1. 4.73 2. 4.73 3. 3.72 4. 0 5. 4.73 6. 4.73 7. 8.76 8. 9.44
IC2 1. 4.62 2. 4.73 3. 4.72 4. -9.17 5. 4.72 6. 4.73 7. 8.46 8. 17.29
IC3 1. 9.44 2. 4.67. 3. 0 4. -4.63 5. -9.18 6. 4.88 7. 7.16 8. 9.44
I have tried two MAX1044 with little change.
If anyone has any thoughts on this or experienced similar, save my project. Thanx in advance.