Racal MA4204 military digital voice speech scrambler crypto radio NOS encryption For Sale


Racal MA4204 military digital voice speech scrambler crypto radio NOS encryption
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Racal MA4204 military digital voice speech scrambler crypto radio NOS encryption:
$628.95

Racal MA4204 pair digitalvoice speech scramblers crypto military radio

NEW OLD STOCK

Description

Theseare TWO military digital voice encryption units model MA4204, made by defenseand aerospace manufacturer Racal Ltd. UK. (so you will get TWO units when youwin this). The units are new, NOS (New Old Stock), never used; not a scratch onthem.

Theseunits are very rugged (metal case all around) and extremely simple to connectto ANY two-way radio. See this website for the details. They arenarrow-band capable, so they will also work with SSB equipment.

Theseunits are digital scramblers, so this is NOT one of those cheap scramblersbased on a simple voice inversion. There is NO way the average Joe will be ableto crack these. The MA4204 uses a sophisticated time-division scramblingmethod. The scrambling order of the time segments changes each halfsecond and is controlled by a pseudo-random number generator (PRNG). The PRNGitself can becontrolledby three rotary switches located atthe front panel, allowing for 512 different sequences. That might seem low, butremember that a potential hacker would have NO knowledge of the pseudo randomsequence, so even a single code would give you a lot of protection already. Ifyou change the code on a regular basis, you become bulletproof.

The units take 12V to 30 VDC supply voltage, which can either be connected via the front using anexternal DC power supply, or at the back using the battery box (the box takes ten“C” type standard batteries), NOT SUPPLIED with units.

Atthiswebsite you can find a ton of information about the MA4204 scrambler,as well as the pin connections for the hookups. Basically the scramblers areinserted between the audio inputs (microphone) and outputs (speaker) of theradio, so NO modifications to the radio are needed to make these units work.

Of course thecommunication channel does not need to be wireless; you could also connectthese at your landline, or even at your smartphone if you use a 3-prongexternal audio jack.


PRICE IS FOR TWO UNITS, AS IN PICTURES





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