La Radiotechniques (RT)

Radiotechnique (RT) was a French electronics company that made radio transmitting and receiving vacuum tubes.

La Radiotechniques was at first (1919 – 1931) a subsidiary of the French Compagnie générale de la télégraphie sans fil (CSF).

Later (1947) it became a subsidiary of Philips of the Netherlands, who also owned Amperex and Mullard. The Radiotechnique Suresnes factory in 1951 produced half of France’s reception tubes and 30–40% of the wireless telephony receivers.