Huge hum in right side speaker

Hello,

I have a Harting m100k musik-box which produces a huge hum from the right side speaker. I already replaced the feed capacitors and the tubes but the hum remains. When the amplifier get's hotter the hum get's less but still is too loud. Any ideas what I can do to solve this problem?

Thanks in advance and regards,

DucMan

Hello,
have You testet if the hum also exists when the plug from the tonarm is not connectet ?
If not You can test the cable or the cartrige.
You can also look at the volume control if all connections are ok.

regards
Magnus