A very early (the first?) radio microphone built by the designer Reg Moores in 1947. It operated on 70MHz and used amplitude modulation.
The Science Museum has been presented with two very early radio microphones by their designer Reg Moores. Mr Moores was an ice skater and an amateur electronics engineer and before 1939 was trying to develop a radio microphone which could be used for ice shows.
The first use of one of his radio microphones was in 1949 for the ice show 'Aladdin' which was held at the Brighton Sports Stadium.