Just resoldered all of the joints for the transistors. They all definitely have good connections with the circuit trace. I didn't have time to do a voltage check, but hooked it back into the system and spun up Cake's Fashion Nugget - Frank Sinatra was the first track I played the other night putting the preamp back into service. I know this album very well. Before I modified the preamp, the trumpet was forward when it came in, now it is very subdued. The vocals also appear to be much softer than previously. The bass is a notable exception - it appears that the bass has gone up in volume. On this particular record, I have to turn the volume up to 55 - 60% to achieve the same volume I used to get at 50%... It seems the mids and highs have decreased in gain, while the lows have increased in gain.
Tomorrow evening, or perhaps tonight as time allows, I'll recheck all of the voltages. I also rechecked all of the diode and led directions, and they are all in the right way round. I'm scratching my head...
