LP12- Power Supply- Need education

Oh and Daveyf I have SOTA Cosmos with a Kuzma 4 point 9 on it as well as an SME 30/12 with a 4 point 11 along with a multitude of cartridges. 
If I can save someone the misery of buying an LP 12, even a used one I am a happy guy. You are better off buying a Rega or Project. At least you don't have to worry about your tonearm bouncing off into the ozone. There is no way to set up an LP 12 correctly. It is hopeless from the start which is why so many people have to invent up grades to it hoping that somehow they will be able to make it work right?? Give up. It is not worth the heart burn. Get yourself a Victrola. Play some old 78s. 

Lewm, I have never had any speed issues with my SOTAs, not near as bad as tonearms bouncing off into space with the LP 12. But in case you are skeptical the new SOTAs have DC motors with microprocessor control. 
Daveyf, anybody who prefers a fixed table over a properly suspended one does not spend much time listening to vinyl. Unipivot tone arms are made by manufacturers who want to increase their profit margin. The newer Graham arms might be an exception. But even Graham had to resort to all kinds of magnetic wizardry to make it work. No anti skating? That should tell you something in and of itself. The last LP 12 I had was sold in 1980 for an Oracle another table that had much to be desired. I have not played with a recent one
  

daveyf, not even close. You have to have experience with multiple other turntables to know exactly how hopeless the LP 12 is. It is just not easy to make a silk purse out of a sow's ear. It does not feel flimsy, it is flimsy, Don't waste your money trying to make an LP 12 better save up for an SME or SOTA and get a real turntable.

Davey, I lived with LP12s for 10 years. The only thing I have nice to say about it is that it had a dust cover. The only reason I stuck with them is because until the SOTA Sapphire came along everything else was worse. You want to know how crappy the LP12 is? Get your self a SOTA Sapphire. 

Millercarbon, the power cord made a difference only because you wanted it to. In reality it did not make any difference. Don't feel like I am picking on you. I sometimes have trouble separating psyche from reality. I have never used either turntable you have mentioned and can not speak to their performance. If you had problems with them then I would have to believe they were either not set up correctly or were not good examples of suspended turntables. Neither the SOTA or the SME are sexy turntables. The industry knows that if you make something look sexy enough many people will think they sound better. The reason most turntables are not suspended is because it is not an easy thing to do.
You either have to make it massive so that any additional mass (the tonearm) is trivial (SME) or create a system were in you can compensate for the mass of the tonearm (SOTA). Both turntables are far more accurate than the resolution of your brain to detect any speed variation flutter, wow or otherwise. All you are going to get out of a more massive platter is higher shipping cost and faster bearing wear. 
Very few upgrades result in "huge" improvements.  I think you minimize your opinion by describing variations this way. Whenever I hear "huge," "dramatic," "incredible," I automatically turn the comment off. 
I heard a demonstration comparing a Clearaudio Statement/Goldfinger combination with an SME 30/12/V12/Goldfinger combination and if there was a difference I certainly could not hear it neither could anyone else I talked to. None of us knew what was playing at any specific time until the end of the demonstration. 

See msnpassion. All this is meaningless mental gymnastics.Any minor irregularities are filtered out by the mass of the platter. They never make it to the record.
Millercarbon since I know you are a smart guy I have to believe that you have never had a chance to live with a properly designed suspended turntable. The Linn is far from properly designed. It is designed to give you heartburn it is so unstable. Once you live with an SME or suspended SOTA for a while you would not live with anything else. They are amazingly stable and nothing gets to them. I can not speak for Basis as I have never lived with one. Get or borrow a medical stethoscope and listen to the surface your turntable is on. Even if it is granite on a concrete floor you will be amazed at the stuff you will hear like the washing machine and your air conditioning compressor not to mention all your subwoofers. Listen to your platter. Hopefully you hear nothing. Don't forget to take the mat off. If you listen to a Linn platter you will be able to pick up radio stations. If you listen to an SME or SOTA platter you will hear nothing. Now if your setup is on a wood floor there is absolutely no comparison. If you jump up and down in front of a Linn you will send your cartridge to the moon. If you do that in front of any mass controlled table you will get the same effect. If you do that in front of a SOTA or SME you will see their suspensions do two or three slow cycles and the tonearm and cartridge continue to track perfectly as the whole mess is moving perfectly at 2-3 cps well below the cartridge/tonearm resonance frequency. 

msnpassion, I think you answered your own question. Having owned two LP 12s, the problems I had with that table had nothing to do with it's power supply. Rotational stability was fine and none of the cartridges I used with the LP12 had a noise issue. I expect you are about to hear all sorts of conflicting opinions all based on razor sharp hearing abilities I obviously do not have.