[Hallicrafters] Off-subject / RCA Victor Am 5 radio

[Waldo Magnuson]

Hi, I use a RCA Victor (model 9-X-561) 5 tube All-American 5 radio to play 8-track and 45 rpm records.  All tubular and electrolytic capacitors have been changed but there is still a lot of 60 cycle hum.  The phono input area is very sensitive to stray pickup.  Is there anyone familiar with these circuits that might direct me to the cause and fix for the hum?  Thanks.
73,  Skip  W7WGM