Smart power supplies for turntable

Kingharold, In the context of your thread, wasn't it mentioned that your Clearaudio has a voltage regulator on board the chassis, feeding 12VDC to the motor?  Either that, or the $1200 option includes a regulator at its output.  Because of the voltage regulation, which is a very good way to go by the way, it is likely that the battery itself puts out more than 12V, because any VR itself drops some voltage from its input to its output. In fact, the voltage drop is necessary for good regulation. So, if one wants to build a less expensive version of a batt supply for the Clearaudio TT, one has to know precisely how the PS circuit is actually implemented, including precisely what is the voltage output expected from the battery to keep the voltage going into the motor stable.  It was at that point, I think, that you decided to spend the bucks on the OEM supply offered by Clearaudio.  Just hooking up a 12V batt (if it's a 12V motor) would be a bad idea, I think we all agree.  (I would still favor trying an AC power regenerator that has the capacity to supply AC power to other components in your system as well as the TT.)

Anything you want.

So sorry, I meant "cindyment", not "candy".  I mistyped "cindy".

Good points to consider from candy.

There was a fairly long thread about the Clearaudio optional battery supply, and the OP eventually bought it, for $1200, even after he received tons of advice on alternative approaches for fewer dollars.  You might want to check out that thread. IF you were to rig up your own battery supply so as to save money over the Clearaudio optional supply, then you would need to know some very specific info about the Clearaudio TT motor and the onboard components of its existing power supply that runs off wall AC, apparently.  See the older thread for that information.  Like sryeager mentioned above, an AC power regenerator would solve your problem and probably supply enough AC watts to take care of some of your other components, which must also be suffering if your line voltage gets down as low as 113V.  You can buy a used PS Audio P10, which makes around 1200W of pure 120VAC, for between $2000 and $2500.  I use a P15, the current version of the P10, really, on my basement audio system, and the results are superb. What's more, PS Audio takes good care of its customers.

Forgot to mention the key fact that AC power regenerators deliver a rock stable clean 120V, as well as pure 60Hz. 

If your local AC is truly "dirty" and unstable as to line voltage, then you might consider a power regenerator, like any of several made by PS Audio.  These devices are like amplifiers; they run off your line AC, convert it to DC, and then put out a pure sine wave at 60Hz.  The PS Audio P3, which makes 300W of pure AC, is probably sufficient for your TT.  DC supplies made from batteries are fine also, if your TT uses a DC motor. You fail to specify what kind of motor is in your TT and what DC voltage it requires, if in fact it is a DC motor.  Meantime, your Nagra conditioner ought to be at least helping the situation, although conditioners and filters cannot control the magnitude of the AC voltage; they can only clean it up.