Homepage Crypto Index Enigma Hagelin Fialka Siemens Philips Nema Racal Motorola STK Transvertex Gretag HELL Telsy TST Mils AT&T Tadiran USA USSR UK Voice Hand Mixers Phones Spy sets Burst encoders Intercept Covert Radio PC Telex Agencies Manufacturers Donate Kits Shop News Events Wanted Contact About Links Racal MA-4225 Portable encryption unit The MA-4225 is a portable voice encryption unit developed and sold by Racal COMSEC Ltd. in the UK in the early 1980s. It has roughly the size as a portable radio (transceiver) and was probably used to add secure voice transmission to such portable radios.   Judging from the manufacturing date-codes on the various chips on the PCB, the units was built around 1984. The MA-4225 contains one large PCB with nearly 20 different hybrid building blocks, most of which are sealed. At present no further information about this portable unit is available. If you know more, please contact us.      Further information Other Racal cipher machines Other voice encryption 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 2009-2013, Paul Reuvers & Marc Simons. Last changed: Wednesday, 11 April 2012 - 17:12 CET