Original, tested and working Nintendo Donkey Kong style power supply, isolation transformer and related components as shown. This item is complete and works fine, with some typical wear and dirty from sitting over the years. Power supply has been tested and works, but we'd recommend rebuilding it at this point, our guess is it has not been rebuilt.
Commonly used in Nintendo's Donkey Kong and Donkey Kong Jr. games, among others. Transformer Part # PT821B, Power Supply Part # PP-7B.
