Title: Crystal Sets and the Brookman's Park Transmitter.
Seller ID: 54799
London: BBC, 1929. Decorative printed wrappers, stapled. Illustrated with drawings of circuits and antenna placement. Staples rusted, covers dust soiled, very good. Laid in is a subscription form the THE LISTENER. This booklet was issued by the BBC when they changed the strength and location of some of their transmitters. "The pamphlet .... was distributed free of charge to large numbers of listeners." [Briggs: The History of Broadcasting in the United Kingdom: Volume Two].