[Radioroslyn]

So your the other collector in Clayton. I've got some kin in Chapel Hill and Mebane. The hum will probably go away when you replace the filter condensers C-101 102 and 103. Polarity is important the 50X6 tube is use as a voltage doubler. Most AC/DC sets use a half wave rectifier and only develop about 120vdc for the high voltage. Your set is not truly an AC/DC set as the voltage doubler requires AC for it to double the DC output. It will develop about 225vdc so it is also important that your replacement condenser are rated at 250v or better. It also sports an AC motor the the turntable.

Terry N3GTE