Nederhorst den Berg used to be the centre for the Netherlands Radio Control Service, the government department responsible for monitoring the airwaves. Part of their job was investigating interference complaints - the other part was monitoring the spectrum for pirates and clandestine stations (read spies). Several of the staff were listeners to Media Network, and so we accepted an invitation to have a look round. The photo shows the monitoring station at the height of its importance, in the 1950's.
This episode is hosted on the Media Network vintage vault