12-06-2021, 12:53 PM
I finished the recap and rebuilt the electrolytic cans with the 12uf Nichicon electrolytic caps and did the alignment and the radio sounds fantastic. Then I moved the chassis upstairs from my basement shop and installed it in the cabinet. When I turned it on, it had the same sensitivity and volume but there was a faint but audible low level hum that was constant if the radio was playing broadcast AM or if the Bluetooth was playing clean music from my cellphone. The radio is on an extension cord but other than that, the setup is the same. The basement shop is full of fluorescent lights and potential interference producing electronics and the radio played clean. Any suggestions as to where I can begin troubleshooting?
