Steven Tate
CEO Flat Forehead Soc.
.I know I'm not the first one to have this problem, but haven't found the answer in the search function. Just finished recapping a 2245. It sounds great. Before recapping, I measured DC Offset and idle current to make sure they adjusted out OK. They did, but I probably only ran it about five minutes per channel to check idle current. I recapped all boards, including replacing the diff pair with gain matched transistors. After completing the project, adjusted power supply and DC offset. All set well. Adjusted right channel idle current and let run for 15 minutes to settle at 5 mV. When I did the left channel, all looked well for about five minutes, but after 15 minutes, the voltage kept slowly climbing until the trimmer was completely counter clockwise with voltage at about 6.5 mV. Nothing looks hot and the sound is good. Think I might try a different matched diff pair? Where should I start? Thanks!
Steve
Steve