Tag Archives: BBC

David Warren: Radio enthusiast who invented the “Black Box” flight recorder

As a schoolboy, David was fascinated by electronics and learned to build his own radio sets (Source: BBC and the Warren Family Collection)

Many thanks to SWLing Post contributor, Paul W4/VP9KFPaul W4/VP9KF, who notes that David Warren, inventor of ‘Black Box’ recorders was a ham radio operator and radio enthusiast.

The following short biography comes from this memorial website:

David Warren (full name David Ronald de Mey Warren) was an Australian inventor. He is most famous for his invention of the Flight data recorder (invented in 1956), or more commonly known as the “black box”

The “Black Box” is a device that records in-flight conversations and data. Warren came up with the idea of recording the flight crew’s conversation on a device that could be protected to increase its chances of surviving the crash. Although it has the name “Black Box”, it is coated with heat-resistant bright orange paint for high visibility in a wreckage, and the Black Box is usually mounted in the aircraft’s tail section, where it is more likely to survive a severe crash.

David Warren was born on the 20th of March, 1925, on Groote Eylandt, an island off the coast of the Northern Territory. He was the first child of European descent born on the island. When he was at the age of four, he was sent to Tasmania and Sydney to spend most of the next 12 years in boarding schools (Launceston Grammar School in Tasmania and Trinity Grammar School in Sydney).

Australia’s first major air crash in 1934 claimed the life of David’s father.

Warren had received a crystal set from his father just before the disaster that started his interest in amateur radio and electronics. Almost 20 years later, when the age of commercial jet aircraft was just beginning, Warren worked as a chemist, specialising in aircraft fuels at the Aeronautical Research Laboratories.

Dr Warren was working as a scientist at Melbourne’s Aeronautical Research Laboratory, where he was helping to investigate the 1953 mystery crash of a Comet jetliner. New fuels being used in Jets in the early 50’s were more likely to become explosive at altitude than conventional aircraft fuels and this was identified as a possible cause of the Comet crash. While listening to the arguments over possible causes of the Crash, Warren realised that the solution could be at hand if someone on the plane had been carrying a device similar to the then newly released “Protona Minifon” portable recorder that he saw at a trade fair.

The device would be fire proof (using steel wire as the recording medium like the “Pocket Recorder”) and erase itself so that the last hours of the flight were always recorded. The device consisted of a single steel wire as the recording medium and provided four hours of recording and automatically switched itself on and off with the aircraft. It was during this period that Dr Warren incorporated the idea of recording instruments on a separate channel – his interest in electronics as a schoolboy was brilliantly applied to turn instrument readings into recordable dots and bleeps.

The recorder was well received in England (where the name “Black Box” was made up by a journalist at a briefing) and also in Canada where the idea was seen as a potential addition to beacons being developed there.

Warren continued to lead the project, developing the Flight Memory device to record more instruments with greater accuracy. This led to the first commercially produced flight recorder-the Red Egg.

A further disaster at Wintoon in 1967 saw Australia become the first country to make both flight data and cockpit voice mandatory on all jets.

While a student at the University of Sydney, David met Ruth Meadows, who became his wife and lifetime supporter. Together, they raised a family and shared an interest in science and education. When he retired, David and Ruth lived in Caulfield South, Victoria, in regular contact with their four children and seven grandchildren.

David died at the age of 85 in 2010, 19 July, Melbourne, Australia. After his death, He was buried in a casket bearing the label “Flight Recorder Inventor; Do Not Open”.

Then in June 2012, the ACT Government named a road, David Warren Road, in the suburb of Hume in recognition of Warren. On 25 March 2014, the Defence Science and Technology Organisation renamed their Canberra headquarters to the David Warren Building.

Thanks for sharing this, Paul!  Fascinating…

Note that the BBC recently published an amazing piece about Dr. Warren on the 9th anniversary of his passing–click here to read.

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Site shares story of the BBC’s wartime reporting

Many thanks to SWLing Post contributor, Kris Partridge, who shares the following note following our recent series of posts about WWII radio:

The, nearly, full story of the BBC’s wartime reporting can be found here. Yes, I hope another interesting read both for your good self and the readers of The SWLing Post:

http://www.orbem.co.uk/repwar/wr_action.htm

What an excellent read! Thank you for sharing this link, Kris!

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Radio Doc: New York City’s pirates of the air

SWLing Post friend, David Goren (the same fellow behind Shortwaveology and the Brooklyn Pirate Radio Sound Map) has just produced and presented a BBC World Service documentary about the pirate radio scene in NYC.

Spoiler alert: it’s amazing–!

Below, I’ve included the description and audio links from the BBC World Service:

New York City’s pirates of the air

As the workday winds down across New York, you can tune in to a clandestine world of unlicensed radio stations; a cacophonous sonic wonder of the city. As listeners begin to arrive home, dozens of secret transmitters switch on from rooftops in immigrant enclaves. These stations are often called ‘pirates’ for their practice of commandeering an already licensed frequency.

These rogue stations evade detection and take to the air, blanketing their neighbourhoods with the sounds of ancestral lands blending into a new home. They broadcast music and messages to diverse communities – whether from Latin America or the Caribbean, to born-again Christians and Orthodox Jews.

Reporter David Goren has long followed these stations from his Brooklyn home. He paints an audio portrait of their world, drawn from the culture of the street. Vivid soundscapes emerge from tangled clouds of invisible signals, nurturing immigrant communities struggling for a foothold in the big city.

With thanks to KCRW and the Lost Notes Podcast episode Outlaws of the Airwaves: The Rise of Pirate Radio Station WBAD.

Producer/Presenter: David Goren

Click here to download New York City’s pirates of the air via the BBC World Service.

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“Managing SW Broadcasts From Ascension Island”

Location of Ascension Island in the South Atlantic.

Many thanks to a number of SWLing Post contributors who share the following story from Radio World magazine (this summary via Southgate ARC):

Managing short wave broadcasts from Ascension Island

Radio World reports on the remote Atlantic Relay Station that transmits critical radio broadcasts to millions in Africa and beyond

A six-mile stretch of volcanic rock in the middle of the South Atlantic Ocean is home to the BBC’s Atlantic Relay Station.

Now managed and operated by Encompass Digital Media on behalf of the BBC World Service, the stations’ six powerful shortwave transmitters on Ascension Island beam program in a dozen or more languages to some 30 million listeners in north, west and central Africa.

The shortwave transmitters include two 250 kW Marconi BD272 transmitters originally installed in 1966 (and still in daily use) and four 250 kW RIZ K01 transmitters, which are also capable of transmitting in Digital Radio mode.

Read the Radio World story at
https://www.radioworld.com/columns-and-views/managing-sw-broadcasts-from-ascension-island

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Channel Africa and other broadcasters affected by closure of Meyerton Shortwave Station

Meyerton Shortwave Station

Many thanks to SWLing Post contributor, Gaétan Teyssonneau, who notes that Channel Africa will end their shortwave service on March 31, 2019. The Meyerton Shortwave Station is closing which will effectively end Channel Africa’s shortwave service but also end Africa relays for a number of other major international broadcasters.

Alokesh Gupta reports:

“It is confirmed that Sentech of South Africa is ending SW broadcast from 31 March 2019. So Channel Africa (Old Radio RSA), BBC, NHK, VOA, AWR. Deutche Welle & South Africa Radio League etc.broadcasting via Meyerton transmitting site will be only in memory shortly informs Jeff White in the AWR Wavescan program of 24th Feb 2019. (Via Jose Jacob)

Meyerton Short Wave Broadcasting Relay station is operated by SENTECH in South Africa, the signal distributor for the South African broadcasting sector. The organisation began operations in 1992 as the signal distributor of the SABC. Sentech now operates as a commercial enterprise.”

Channel Africa is asking for your feedback and will even have management live in-studio on the dates below:

Click here to view contact details on the Channel Africa website.

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