Hi Mick
Here is a photo of the 9 pin socket, to me it looks like (and knowing KB) it is possibly American, was there ever a UX9.
The transformer, apart from the standard 250 0 250 secondary volt @ 55mA windings, needs a 13 volt @ 0.8 amp secondary centre tapped, with 2 additional taps to give 4 volts @ 2 amps. These could be separate windings but in the original they are shown as one winding. See drawing of PSU in post #4.
In addition there is a 4 volt 2.5 amp winding for the rectifier.
thanks
Mike