Radiola 28 (DC)

[Electronic M]

Are you sure the antenna is connected right? I had two seemingly identical Zenith wave magnet antennas come with a console, and the plug on the nicer looking one was wired so that it would short the AM signal out on the console I got it with. It took me forever to find what a double check of antenna wiring could have found in 5 minutes.

If the antenna is right recheck your other work, if your other work is right put it back to the last configuration that worked and then change one thing back to present condition at a time checking performance between each step.