[dr.delco]

Fellow Phorum members, thanks for all the input so far.

To answer some questions. Yes, C49 and C51 were replaced. I know about the missing tie point on the schematic.

I can say that I went over all connections in the power supply circuit to make sure all connections were correct and had good connections.

I have restored a lot of vintage radios, Philco and others, and have never had this level of hum with all necessary components replaced.

As I stated, I could add extra capacitance to the circuit which practically eliminate the hum, but it bothers me why it cannot function properly with the 8uf as designed.