Marconiphone P17B personal broadcast receiver, 1947.

Marconiphone P17B personal broadcast receiver, 1947.

Philips combined television and radio receiver, type 663A, 1948.

Pye transistor radio, c 1960.

Prototype grid stereometer, 1948.

Ekco 'superhet' broadcast receiver, c 1935.

Ekco 'superhet' broadcast receiver, c 1935.

Television receiver built from 'Premier Radio' kit, 1949.

Cosmos crystal radio receiver, c 1925.

Cosmos crystal radio receiver c 1925.

Philco 'People's Set' Model 444 broadcast receiver, c 1936.

Radio with the first Printed Circuit Board by Paul Eisler, 1942.