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Old 3rd May 2009, 08:51 PM   #1
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Question Turntable rumble?

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?
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Old 4th May 2009, 02:46 PM   #2
tinitus is offline tinitus  Europe
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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

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Old 4th May 2009, 08:28 PM   #3
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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
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Old 4th May 2009, 08:53 PM   #4
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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
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Old 4th May 2009, 08:57 PM   #5
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Quote:
Originally posted by 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

This would be one option

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