Raven One Motor Noise Problem

You have good points. The pulley's set screw is tight. What makes real sense is to move the table to another platform to see if there's noise.

Raven One owners, when you put your ear right up to the face of the Motor Control can you hear the tranformer. I was getting a slight buzz with it sitting on a wood shelf. I placed two TTRisers by TTWeights Audio under it and this completely eliminated the noise.

Update - I followed Lewm's lead (question) and moved the TT to my wood floor. "No noise."

This is a big shot in the dark. I don't have any experience
with your raven. But I did have a sme 20/2 with a noisy
motor at one point. Turns out I had been putting 2 drops
of oil in it over time vs one drop a year. I thought for
sure it was a bearing going out. Sme sent me some
instructions, 30 min later and a few q tips noise was gone..

Call Jeff at HIGHWATER SOUND he can fix the problem i never heard of a noisy RAVEN.

Ebm, Apparently you have never read Edgar Allen Poe. (Could not resist the opportunity for some levity.)