trouble in paradise

[tpryan]

It looks like there is an extreme DC offset that the servo can't correct, at least not all of the time. Re-flow the solder joints around Q1 and Q2. Make absolutely sure you haven't installed the wrong value resistors at R22, R23, R25 and R28. If that has no effect, try lifting or snipping one end of D1 through D4. One of the diodes may be leaky. Let us know what you find.

[wertt]

went through and reflowed anything that looked a little weird. i noticed one solder point (on r33, i think) that looked like i may have missed it completely. i plugged the pre back in and am recording it...so far so good. it's passing signal and very clean. i'm going to let it run a while and flip the power supply on periodically, but it looks like i'm out of the woods. thanks for all your help!

my n72's arrive thursday...i'll be sure to be more careful this time arond.