Andrew Heck
Active Member
The tonearm proper is not. The connector between the headshell and tonarm is as well as the negative terminals on the cartridge. But no, the actual tonearm shows no continuity with the chassis.
What Makes One Turntable Sound Better Than Another One?
- Thread starter Andrew Heck
- Start date
Superampman
AK Member
Hook it up! Otherwise, where is the Sansui in relation to the speakers? Even if you swap the tts in the same spot, it's possible to produce feed back from one and not the other.
OP, I had the same hum problem with my sansui 2050c as the hum would occur when the stylus hit the record. At first I just accepted it as rumble being transmitted from the platter bearings into the cartridge and that was just the limitation of the tt. Then found out that other users of this tt did not experience the issue so I investigated further.
I then noticed that when I start the platter (meaning the motor is spinning), I could feel a slight vibration in the cartridge headshell. So I figure the rubber motor mounts must be no longer supple due to the age of the tt and the motor vibration is somehow getting to the headshell. I then inspected the rubber motor mounts and found them to be fairly soft so I was puzzled with the cause of the vibration at the headshell.
I then noticed while flipping the tt upside down that the motor is not very secure as it has some play in the way it is mounted. At first I thought the motor mounts were broken and that is causing the play but upon further inspection I think that is the design of the tt. I think the motor floats a little on the rubber mounts.
So I flip the tt in its normal upright position and pull up on the motor belt shaft and sure enough there is some movement. I try to seat the motor as center as possible (kind of hard to describe this) and place on the belt and platter. Start the motor and the vibration in the headshell is gone. I then listen to a record and the hum problem is also gone.
My conclusion is that I think if the motor is not seated properly, the motor may be contacting some other part which then send vibrations to the cartridge headshell.
Hope this helps you in solving the hum problem as after I got rid of the hum, I am enjoying the tt much more.
I then noticed that when I start the platter (meaning the motor is spinning), I could feel a slight vibration in the cartridge headshell. So I figure the rubber motor mounts must be no longer supple due to the age of the tt and the motor vibration is somehow getting to the headshell. I then inspected the rubber motor mounts and found them to be fairly soft so I was puzzled with the cause of the vibration at the headshell.
I then noticed while flipping the tt upside down that the motor is not very secure as it has some play in the way it is mounted. At first I thought the motor mounts were broken and that is causing the play but upon further inspection I think that is the design of the tt. I think the motor floats a little on the rubber mounts.
So I flip the tt in its normal upright position and pull up on the motor belt shaft and sure enough there is some movement. I try to seat the motor as center as possible (kind of hard to describe this) and place on the belt and platter. Start the motor and the vibration in the headshell is gone. I then listen to a record and the hum problem is also gone.
My conclusion is that I think if the motor is not seated properly, the motor may be contacting some other part which then send vibrations to the cartridge headshell.
Hope this helps you in solving the hum problem as after I got rid of the hum, I am enjoying the tt much more.