Turntable rumble?

[bereanbill]

Hi...I picked up a Lab-420 TT at a local thrift stor for $5.00, and it functions well but has audible rumble. I have it isolated from the rest of my audio system...could I put it on a rubber pad...would that help? Is it possible for a cartridge to go microphonic and pick up rumble? It is direct drive...could there be a problem within the drive train?

 

[tinitus]

Feedback has always been a problem
Why the soft suspention was "invented"
A heavy block/shelf helps too

But rumble is a different matter

Anyway, you need a highpass subfilter

If possible try to lubricate the bearing with fine oil, used fore sewing mashines
Or maybe fine teflon oil

 

[bereanbill]

Where would I find a high pass sub filter? Light machine oil I have..always go with the least complicated (and least costly) solution first.

"You can't make chicken salad from chicken crap ! " My Grandpa

 

[vinylkid58]

There is a manual for the Realistic LAB-400 in the: http://www.vinylengine.com/library/realistic.shtml
If you register, you can download the service manual.

Jeff

 

[bikehorn]

Where would I find a high pass sub filter? Light machine oil I have..always go with the least complicated (and least costly) solution first.

"You can't make chicken salad from chicken crap ! " My Grandpa

This would be one option

http://sound.westhost.com/project99.htm