The original radar equipment as fitted to the Explorer when new is long gone having been updated probably more than once during her long career. Phil Harley has done some research for us and he believes that the Marconi Mk IV equipment shown was the original fit.
Marconi Radiolocator mark IV display
We believe this was the original type of radar fitted to Explorer as built
Marconi radiolocator probably mark IV transmitter unit cabinet
Marconi radiolocator mark IV cabinet transceiver unit drawing