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In Reply to: Rega P3 seperate power supply posted by zuheyr on September 18, 2006 at 11:19:24:
It's pretty easy to make a dual phase supply for any synchronous motor TT and give it alterable phase angle (quadrature). Total cost is about $50 if you already own an ipod or other MP3 player, you can have as many speeds as you like.I'm not sure about the motor change. I thought the new motor used a different, more rigid, mounting method.
Follow Ups:
I thought the new Regas used a DC motor, thus the lower vibration. Thats the theory behind the origin live DC motor swaps.
The new Rega motor is a synchronous motor, as far as I know it is internally identical to the old motor but uses different fixings (maybe someone who has used both can confirm or deny this). The new drive is "tuned" to the motor by altering the relative phase angle of the nominally quadrature pair, thus the motor and drive must be done together.As I said, it is relatively simple and cheap to replicate do this yourself on any existing synchronous motor. All you need is an Ipod, a T amp and a couple of small transformers, all up it costs about $50 if you have the Ipod already.
Yes, the new motor instead of being slung on rubber bands is a much lower vibration design that is glued rigidly to the plinth.
If you change phase angle and relative phase voltage on a synchronous motor you can normally find a "sweet spot" with much lower vibration. The new Rega drive is tuned to this sweet spot for the motor which is why the motor and drive go together.If you build your own drive you have to find your own sweet spot, fortunately it's obvious.
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