I just completed my 2nd st-70 rebuild today and upon hooking it up to the system I've found that the right channel output is much less than the left. I'm using a replacement a-470s from triode electronics on the right channel and the older stock one on the left. I've tried swapping the output tubes from side to side with no difference. Same with the input tubes, no difference. The bias is solid on both channels and music comes through clean and clear with no audible distortion, it's just that the right channel is much quieter.
I just need to be pointed in the right direction. Thanks in advance for the help!!