240v -> 110v Transformer
Replacing a great big wire-wound 'ballast'/'dropper' resistor, which heated up like a small electric fire.
The set is essentially 110v, and was required to work on DC supplies as well as AC supplies, as the S780 was designed to be employed in the cabins of luxury cruise liners, which often had DC mains supplies. Hence a transformer for dual 110v/240v operation would have been no good.... However, the resistor got very hot, needlessly wasted a lot of power and likely wouldn't have met today's safety standards.
240v -> 110v Transformer
Replacing a great big wire-wound 'ballast'/'dropper' resistor, which heated up like a small electric fire.
The set is essentially 110v, and was required to work on DC supplies as well as AC supplies, as the S780 was designed to be employed in the cabins of luxury cruise liners, which often had DC mains supplies. Hence a transformer for dual 110v/240v operation would have been no good.... However, the resistor got very hot, needlessly wasted a lot of power and likely wouldn't have met today's safety standards.