Meccano Marshall II control unit. This has a 12V controllable output and a 15V AC separate output. The unit is in original, very good condition and comes with mains lead and 13A plug.. I tested it on the bench and it responded fine, but on a layout, not so fine. I asked an electrical engineer for help and after seeing it in action, he thought the rectifier was faulty. I checked with the Meccano collectors club, and they do not have any, so I am offering it as spares or repair.
