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Strange low frequency noise when playing vinyl.

I'm getting a strange low frequency noise when playing vinyl that I did not notice until a month or so ago. My turntable is a Scoutmaster with JMW9 tonearm. I've included a link to a recording I made of the noise. I used the locked inner groove of an LP and removed the belt from the motor and spun the platter by hand. As you will hear, the noise will change with the speed of the LP. I have tried the following the remove the noise: Two different cartridges by different manufactures; outer ring, no outer ring. Clamp, no clamp, two different phono stages. Only possibilities I can think of is bearing noise or resonance of the tonearm.

Link: http://www.mediafire.com/?iski6xsvdsbwbq7

You may need to turn your speakers up to hear the noise.
A_L
arnold_layne

Showing 2 responses by arnold_layne

arnold_layne OP
141 posts
 
It's not video. It's an audio file. There's no way I could capture the low level hum with my camcorder. I used FLAC to encode the audio to make a smaller lossless audio file. You can download VLC for Mac that will play FLAC files.

A_L
arnold_layne OP
141 posts
 
Sarcher30: It's not the motor. The sound is there even with the motor off and the belt removed. I can spin the platter by hand with the needle in a locked groove and recreate the noise. It's definitely coming from the bearing or the tonearm.
I will try and relube the bearing once I get some white lithium grease, but how do I get the old grease from inside the platter housing? I do not want to use "q-tips" as they will leave behind cotton fibers.
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