It worked great. There is a little hum that was not audible before. I think it may be due to the detector/voltage amp tube I replaced. The old one was running on fumes (an original Zenith). There is a lot more gain now. Or the hum might be due to the difference in waveform between the Selenium rectifier and silicon rectifier. Could need a little more filtering. With music or voices at low to reasonable volumes, it is inaudible.

The radio sounds remarkably good with its wood cabinet, alnico 4x6 full range speaker and an electrostatic tweeter (actually works!).

Thanks for the help.

Bob