Burndept Ultra IV radio receiver, 1923.
© Science Museum / Science & Society Picture Library
Well-off listeners in 1923 could afford to buy a valve radio set, such as the Burndept Ultra IV, shown here with an Amplion horn loudspeaker of 1924. The set cost £75 at 1923 prices. Learning to operate such equipment could be a daunting prospect (rather like buying a new home computer today), with several pages of quite complex instructions to absorb.