I am new to this group and hope that I abide to all the rules! My NAD 4020A tuner is 42 years old. One of the channels is going on and off as if there is lost connection. I am from KZN and hope for a technician somewhere that can fix the problem. I also have a NAD amplifier and I think both need a good service. The NAD products are such good quality that I really want to use it still for many years.