'Igranic' short wave receiver, 15-200 metres, manufactured by the Igranic Electric Company Limited, London, England, 1920-1932. Light grey box , Indigraph. With socket to plug headphones into and three black dials, one with scale and one with arrow. Handle on top of box. Labelled "magnum-receiver." Part of amateur wireless transmitting and receiving station (G5FK).

'Igranic' short wave receiver, 15-200 metres, manufactured by the Igranic Electric Company Limited, London, England, 1920-1932.

This is an example of the type of equipment that would have been used by early amateur radio enthusiasts. Early radio receivers were often made by the radio amateurs themselves. Amateurs often transmitted speech or played records, as well as receiving transmissions from other experimenters. This radio receiver was built by F Briggs, and included a custom built desk to mount all the equipment on. It was displayed at the London Radio Exhibition at Olympia in 1932.

Igranic ‘Pentrovol’ transverse current microphone, serial number 478, patent number 301441, mounted on stand, made by the Igranic Electric Company Limited, England, 1920-1932. From amateur wireless transmitting and receiving station (G5FK), built by F. Briggs Esq., as exhibited at the Radio Exhibition of 1932.

Igranic ‘Pentrovol’ transverse current microphone, serial number 478, patent number 301441, mounted on stand, made by Igranic Electric Company Limited, England, 1920-1932. From amateur wireless transmitting and receiving station (G5FK), built by F. Briggs Esq., as exhibited at the Radio Exhibition of 1932.

This is an example of the type of equipment that would have been used by early amateur radio enthusiasts. Early radio receivers were often made by the radio amateurs themselves. Amateurs often transmitted speech or played records, as well as receiving transmissions from other experimenters. This radio receiver was built by F Briggs, and included a custom built desk to mount all the equipment on. It was displayed at the London Radio Exhibition at Olympia in 1932.