Nottingham motor controler

I have been using a Falcon PSU from Phoenix Engineering for over a year in conjunction with my Ace Spacedeck. I think it has made a nice improvement to the sound of my system. Everything has taken on just a bit more nuance and naturalness with the PSU in place.

I haven't tried any other motor controllers or power regenerators.

I am a Nott. Hyperspace owner. IME the Nott. Wave Mechanic is better than wall AC. The Wave Mech. did however experience a blown output transistor in the time that I used it. I know of one other instance where this happened to someone else. Not too hard to diagnose and fix.

Currently I'm using a "beta unit" of a TT PS designed by K&K Audio. It's different in that it has separate outputs for each of the two field coils of the motor. This does require rewiring the motor pod with the removal of the capacitor. This feature allows for the fine tuning of the phase angle of the AC current between the two field coils (with the capacitor and a single output the phase difference is fixed). Also, in addition to the frequency or "speed" control it has an amplitude control. Reducing the voltage to the motor reduces the pulses generated by the motor. Takes Tom Fletcher's "low torque" notion to a new level and IME does improve sound.

The result of this extra control has been IME a much greater improvement in SQ over the standard TT PS from Nott.

The K&K unit uses very high quality parts including "instrument grade" OPA chip amps.

Yes, do it.

I have a NA Mentor, much modified. Motor and WM are vintage 2014/12. I suggest that you get them both at the same time, and they will match the WM to the motor.

The upgrade made a significant difference in my system, at a very reasonable cost.

How have your Mentor been modified?
Well, the motor came with the table, that's what I have.
Yeah, it's about $750 from UK, over $1k in the US.
But blown transistors? I don't like it.

Inna, don't let the comparatively low price of the Falcon PSU deter you. It's got a lot of functionality built into that small case. You can do speed and voltage calibration. I'd at least investigate a bit. No affiliation to the manufacturer, just a happy customer.