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Racal encryption devices
Racal Datacom Ltd., or Racal COMSEC Ltd. was a British manufacturer of military electronics such as radios and cryptographic equipment. It was founded in 1950 and was once the 3rd largest electronics company in the UK.   

In 2000, Racal was sold to the French company Thomson-CSF (now Thales). Over the years, Racal produced many different communications and cryptographic devices, with an increasing degree of sophistication. Some of these devices are described below.

Racal encryption devices described on this website:
 
MA-4204 Voice Crypto Unit MA-4204 MA-4014B Audio Encryption Unit MA-4014B MA-4204 Voice Crypto Unit MA-4224 MA-4225 Portable Voice Encryption Unit MA-4225 MA-4420 Message Base Station (MEROD) MA-4420 MA-4450 Message entry device (MEROD) MA-4450 MA-4470 Voice Crypto Unit MA-4470 Racal MA-44741 Secure Phone Adapter MA-4471
Digital voice encryptor MA-4777 Racal MA-4083C fill gun MA-4083

 
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