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HomeTransatlantic Test Centennial

Thank you for joining us!

We hope you enjoyed this celebratory Transatlantic Test Re-Enactment as much as we did! Complete the form linked below to receive your certificate and copy of the RCA Proceedings.

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RCA Transatlantic Test Re-enactment Form

Watch the re-enactment by clicking the image of RCA President John Facella, below.



In 1921, transatlantic wireless was an arduous and intermittent link done with 250 KW transmitters and antenna superstructures for receiving and transmitting. Radio amateurs, with far less complex and less massive facilities, believed   the latest technology, on the new ‘shortwaves,’ had the capability to span the vast distances. Of the many hams who felt that the capability of transatlantic contact was possible, RCA members, led by Major E. Howard Armstrong, had the know-how to undertake the task and proceeded to do so.


 On the U.S. side, station 1BCG was located in a 10 ft. x 14 ft. wooden hut in a farmer’s field in Greenwich Connecticut. The transmitter had an input power of 990 watts. It was broadcast using a T cage antenna 100 feet long and 70 feet high with a radial counterpoise at a wavelength of 230 meters (1.3 MHz). The night of December 11 was a success, and the transatlantic link was confirmed.




This Transatlantic Test Project, conceived of by radio amateurs (“hams”), proved that even with modest equipment, the Atlantic Ocean could be spanned, opening improved communications for many more purposes.


This project was a watershed.  As a result, for the last 100 years many experimenters and inventors became focused on continually improving wireless technologies and devices. The progress of ‘smaller, farther, cheaper’ was born, leading to the later invention of smart phones, smart watches, smart TVs, wireless Internet routers, GPS tracking devices, and Bluetooth headsets, all of which depend on wireless technologies.


Those pioneers 100 years ago could never have envisioned the way society has been enabled and transformed by wireless—from their historic first!

Transatlantic Test Photos



Other radio groups are also celebrating the Transatlantic Test project, although RCA is the main re-enactment station. Here are some useful links:

UK club KLARC (Kilmarnock and Loudoun Amateur Radio Club) with multiple links to various events during the re-enactment on Dec. 11, 2021, including their reception of the W2RCA CW re-enactment transmission from station K1KL:

Club web page:
Reception of the test:

On includes  pictures of the re-enactment, and many other details:

ARRL News: Two 160-Meter Events in December Give Nod to 1921 Transatlantic Tests (12/2/2021)

ARRL News: Transmissions Set to Mark Transatlantic Test Success (12/8/2021)

ARRL event:

ARRL - Live from W1AW (YouTube) - Transatlantic Centenary QSO Party (begins 0200 UTC 12/12/2021):

RSGB event:

AWA: AWA is planning to show the replica transmitter Dec. 11.

Transatlantic Centennial Test Brochure from Vintage Wireless and Communications Museum


The Antique Wireless Association has a very interesting video, put together by AWA member Bruce Kelley. Watch it HERE.

Looking for a CW Decoder? There are several free decoders available on this PAGE.