Customer was unable to continue running the FatTrack on 230V conditioned supply and was thinking it was overheating again.
The rectified voltages from the original 2x115v primary 2 x 18v secondaries toroidal transformer should be 22V but on our 250V mains were measuring as high as 28V, the HT (from cascaded voltage doubler circuitry) should have been around 185V but was over 230V.
As there were no existing windings for anything more than 230V, I decided that a 2x115v, 15v secondaries would be the answer and replaced the transformer:
Now the rectified voltages down to a more respectable 23V, significantly bringing down the voltage doubler potentials and consequently temperatures much more reasonable.
Also gave the unit a once-over and applied Deoxit D5 to some push button multipole switches which were a little on the noisy side.
All good now! Wish some manufacturers wouldn’t fixate on 230V and at least consider 240V for equipment and design them to cope with up to 260VAC without detriment. Quite a lot of 230V design valve amps for example will be running too hot on UK voltages 240V+.