Homepage Crypto Index Enigma Hagelin Fialka Siemens Philips Nema Transvertex Gretag Tadiran Racal USA USSR Voice Hand Mixers Phones Spy sets Burst encoders Intercept Covert Radio PC Donate Kits Shop News Events Wanted Contact Links Racal MA-4470 Voice Encryption Unit (Wanted item) The MA-4470 was one of the last high-grade voice encryption units to be developed an manufactured around 1996 by Racal COMSEC Ltd in the UK, before the company was sold to Thomson CSF (now Thales) in 2000. A civil telephone variant is known as the MA-4471.   The unit is smaller than any of its predecessors. All controls and connections are on the front panel. Audio and transceiver are connected on the left. The right half of the front panel is taken up by the keypad. To the left of the keyboard is the display. This page is a stub. If you known more about this unit, please contact us.      Interior The rather compact MA-4470 unit can be opened from the rear. The device consists of 4 PCBs plug a font panel. After removing the rear panel, the four PCBs are revealed. From top to bottom there are the interface board, the key processor board, the speech store board, and finally the audio board.   The image on the right shows the processor board, which is the 2nd board from the top. A small metal bracked, that is normally stored between the PCBs, can be used to pull out the boards. ...      Further information Other Racal cipher machines Other voice cypto units Main crypto page Index of cipher machines Any links shown in red are currently unavailable. If you like this website, why not make a donation? © Copyright 2009-2011, Paul Reuvers & Marc Simons. Last changed: Tue,27 Dec 2011.17:46:34