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Turntable Power Source Benefits

Many of the table designs today have the motor separated from the platter and run the platter via a belt or string. I see some people are going to DC to power these motors and the Teres site claims them to be a real benefit. Walker makes a regulated power supply that others have said are helpful.

How are they helpful? I can understand how a steady power supply source can provide a more stable way to deliver constant and unvarying platter speed. But how can they improve the sound other than that if the motor is already separate from the platter? If you have the TT plugged into a separate outlet, how can any power-induced problems get into the sound chain? Do motor cycles jump from the motor to the cartridge?

Help!
motdathird
twl
3,251 posts
 
Zaikesman, I'm glad you are getting a good boost in performance from that new power supply. It must be good, because you've mentioned it on about 3 threads now. I'm sure that it is helping out alot.

As you well know, a DC motor, like the 1200 has, is regulated by the voltage applied, and is adjusted in very small increments. If there was any ripple left in the power after is was converted to DC, then it is going to cause small variations in speed on a DC motor, because that ripple is a voltage variation. Many rectification/regulation circuits still pass a small amount of ripple, and call it DC. That is not conducive to good speed accuracy on a DC motor. You want a perfectly flat DC voltage, and apparently you are getting something like that from your new power supply.

Also reduction of vibration and hum fields from the disabling of the internal transformer are an added bonus, like you said earlier.
zaikesman
3,017 posts
 
No doubt, and I'll be very interested to learn what results Albert obtains running the ExactPower unit, a product I've been looking at for general use in conjunction with my Power Wedge Ultra balanced iso-trans. I'll post a full review of PS-1200 soon.
albertporter's avatar
albertporter
4,949 posts
 
Zaikesman, unfortunately after promising me an audition of the ExactPower, they have not returned my telephone calls.

I guess the excitement at HE 2003 led them to promises they could not keep. Still would be nice to see what it would do in my system.
dougdeacon
3,338 posts
 
Albert,

I'll be very interested in your experiment with the Exact Power for your Walker. Please let us know what you hear.

I have the EP15A already and am about to set up a Teres with its DC motor, without the battery option (yet). Since the EP claims to control voltage +/- 1V, I'm hoping for pretty clean results from the motor. At some point I may plug the Teres directly into the wall to compare, but a new TT, arm, cartridge and stepups all in one month is way too many variables already.
cmk
397 posts
 
I'm running the PS of my Kuzma Stabi via the PS Audio PP300 on the pure sine wave and experienced a huge jump in resolution and stability. Unfortunately, I cannot isolate the effect of the P300 on the turntable alone, as I had to run the phono/preamp via the P300 as well.

Adding the Mystic Mat took the LP playback to another level.
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