When the French Press Discovered Daventry’s “Super-Station”

Throughout 1925, a small town in Northamptonshire regularly made headlines in the European press. Its name was Daventry. To the general public, it was little more than an ordinary English market town. To engineers and wireless enthusiasts, however, it was destined to become the new centre of gravity of British broadcasting.

At the time, the British Broadcasting Company (BBC) was pursuing an ambitious project: replacing its network of small local stations with a single, powerful national transmitter capable of reaching much of the country. In an era when radio broadcasting was still in its infancy, the idea was nothing short of revolutionary. French newspapers followed the project with keen interest, as every technical advance in wireless communication fascinated a public only beginning to grasp the almost limitless possibilities of this new invention.

A “Super-Station” in the English Countryside

On 1 February 1925, Excelsior announced the construction of what it called “the new English super-station at Daventry.” The choice of location was far from accidental. The newspaper pointed out that the site, standing some 200 metres above sea level, offered an exceptionally open landscape, ideal for long-wave transmissions.

The scale of the installation was impressive. Two gigantic masts, each about 175 metres high, were to support an aerial tuned to a wavelength of 1,600 metres the same wavelength that had made the experimental station at Chelmsford famous. Another notable feature was that Daventry would be linked directly to London by special telephone lines, allowing programmes produced in the capital to be relayed to the new transmitter and broadcast across the country.

Excelsior was optimistic. If construction proceeded as planned, the first transmissions would begin early in the summer. The newspaper also noted that British wireless manufacturers welcomed the project enthusiastically at a time when the market for radio receivers was beginning to slow down.

A Project to Match the BBC’s Ambitions

A few months later, the project was nearing completion. On 22 June, Le Petit Parisien announced that station 5XX would officially open on 27 July. The details published at the time reveal the sheer scale of the undertaking. The two steel towers, each about 150 metres high, were almost finished. Powerful illuminated beacons would be installed on top to warn aircraft at night. The station would operate at an output of 25 kilowatts, an extraordinary level of power for the period.

The BBC had acquired an estate covering 23 hectares, around ten of which were devoted to the technical facilities. Even the opening ceremony was designed as a national event. It would be presided over by the Postmaster General the British equivalent of the Minister for Posts and Telecommunications and would include a religious service conducted by a bishop.

The Most Powerful Broadcasting Station in the World ?

On the eve of its inauguration, Le Petit Parisien boldly described Daventry as “the best equipped and most powerful broadcasting station in the world.” The newspaper compared it with major foreign transmitters. Stations in Pittsburgh and Königswusterhausen operated at no more than 20 kilowatts and not on a continuous basis. Daventry, by contrast, was designed to broadcast regularly at 25 kilowatts, with reserve capacity for future expansion.

The location itself contributed to its performance. Built on Borough Hill, a few kilometres from Daventry, the station stood in a sparsely populated area, far from the electrical interference of large cities. Journalists also highlighted another advantage: the site was regarded as being close to the geographical centre of England. The expected coverage was remarkable. Programmes were thought likely to be receivable on simple crystal sets within a radius of about one hundred miles, covering much of England and Wales. In total, nearly twenty-five million people could potentially receive BBC broadcasts. For listeners equipped with nothing more than a basic crystal receiver, such coverage seemed almost miraculous.

The Big Day

The official opening took place on 27 July 1925. The following day, Le Petit Parisien published a detailed account of the ceremony. A large number of distinguished guests attended. A message from Prime Minister Stanley Baldwin, who was unable to be present, was read to the audience. Speeches followed by Lord Gainford, Chairman of the British Broadcasting Company, Director-General John Reith, the Mayor of Daventry, and finally Sir William Mitchell-Thomson, who formally declared the station open.

The minister spoke enthusiastically about the future. In his view, these new technical developments would not only improve communications throughout the British network but would also encourage greater international exchanges in broadcasting. The technical details published on the occasion demonstrated the care taken in the station’s design.

The two towers, standing about 200 metres apart, supported a T-shaped aerial whose various wires were held in place by metal spacers. An extensive counterpoise system surrounded the buildings. Inside, the equipment represented the very latest technology of the 1920s. Powerful water-cooled valves generated and modulated the high-frequency currents, while around ten stages of amplification gradually increased the tiny signal from the microphone to the level required for transmission.

The initial tests were highly encouraging, and engineers hoped to increase the station’s output to 30 kilowatts in the near future. At first, Daventry would mainly relay programmes from London, as Chelmsford had done before it. The long-term objective, however, was clear: to provide the BBC with a transmitter capable of serving the entire country.

A Turning Point in British Broadcasting

Looking back, it is clear that French journalists were right about the significance of the event. Daventry represented far more than a technical improvement or a simple increase in transmitting power. It embodied an entirely new concept of broadcasting. Rather than multiplying small local stations, the BBC had chosen to rely on a single powerful national transmitter operating on long waves and capable of reaching millions of listeners. This strategy would shape the British broadcasting landscape for decades to come.

Daventry : A Pioneer Soon Overtaken by Progress

The call sign “5XX Daventry” quickly became familiar to generations of listeners. It was well known on the other side of the English Channel as well, as French newspapers regularly listed BBC programmes under that name. The transmitter itself paved the way for the great national broadcasting networks that would define much of the twentieth century. Yet radio technology evolved at an astonishing pace.

By 1934, the BBC had inaugurated an even larger “super-super-station” at Droitwich, four times more powerful than Daventry. The Daventry site was subsequently converted into a short-wave transmitting centre. After more than six decades of service and adaptation to changing technologies, the Daventry transmitting station finally closed on 29 March 1992.