TECHNICS SP10 MK3 POWER SOURCE / SPEED CONTROLLER

That's lovely, for someone with a Mk2 or 2A. I am loving my Mk3, however, now with Krebs modification. Was listening to it all day today. Incidentally, if the OP is still alive and still cares, it is not out of the question that Richard Krebs might know who or how to build a Mk3 supply complete with servo circuits.

Lew, Just for the record the bucking technique I described does not use an isolation transformer and is a lot less expensive- literally can be done for under $20.00 in parts.

Sorry, Ralph. I was referring to the OP's original question; he is or was searching for a complete Mk3 outboard PS. There is a lot more to that than just addressing the difference in wall voltage between the US and (Eastern) Japanese standards of 120VAC vs 100VAC, respectively. As you probably know, the Mk3 outboard box contains all the servo drive circuits as well as a PS to produce the various needed DC voltages. However, his post is now about a year old, and he has probably moved on to other audio concerns. So, we're basically talking to each other.

11-22-15: Lewm
That's lovely, for someone with a Mk2 or 2A. I am loving my Mk3, however, now with Krebs modification. Was listening to it all day today. Incidentally, if the OP is still alive and still cares, it is not out of the question that Richard Krebs might know who or how to build a Mk3 supply complete with servo circuits.

Lewm,
The OP would be advised to contact Bill Thalman. Richardkrebs has used Bill Thalman to repair his own power supply on occasions.

Lew
Glad that you are enjoying my upgrade.

Re a controller for the SP10 MK3
The motor unit has all of the infrastructure in place. Commutation and speed sensors.
There are a number of quality industrial PMSM controllers that could likely work well. They are expensive and can be a time consuming pig to program. Thus one would need deep pockets indeed to go down this road.