To diagnose this thing, pull the 25 Amp fuse for the clutch, in the fuse panel to the rear of the battery and start it. If it is now quiet, the bearing and clutch is good. If the clutch is noisy, you either have a bad bearing in the clutch, or the plates are noisy from all the wear, trying to drive a bad compressor and the melted coil insulation, which is surely contaminating the clutch plates. Can you see a row of melted black plastic on the bottom of the hood that lines up with the clutch pulley? It will look like a line of black paint splatter. This would be the melted insulation from the clutch coil.
Have someone help you with this, you should be the observer under the hood. Put the fuse back in and make sure the AC is off. Start the engine and let it idle for a couple of minutes. With the engine at a slow idle, have your helper turn the AC on. If the clutch is screaming, and the engine is being loaded down, you need to get a compressor. The clutch is probably shot by now too, so just get the compressor and be done with it.
If you try to go cheap and don't do a full diagnosis, it will cost you more in the long run. I know from experience. I mentioned jeepsareus.com before because they beat the stealership cost of the compressor by $200 and have fast service. I do not own any interest in that business.