AN/PRC-77 Portable Transceiver
AN/PRC 77 Radio Set is a manpack, portable
VHF FM combat-net radio transceivermanufactured by "Associated Industries" [http://www.associated-ind.com/] , Manufacturer's website.] and used to provide short-range, two-way radiotelephonevoice communication. It can provide secure voice(X-mode) transmission with the TSEC/ KY-57. The radio consists of the RT-841transceiver and minor components. In the Joint Electronics Type Designation System(JETDS), AN/PRC translates to "Army/Navy, Portable Radio, Communication."
The AN/PRC 77 entered service during the
Vietnam War(circa 1968) as an upgrade to the earlier AN/PRC 25. Today it has largely been replaced by SINCGARSradios, but the AN/PRC 77 is still capable of inter-operating with most VHF radios used by U.S. and Allied ground forces. It is not compatible with the SINCGARS frequency hopping mode. It can be used with the KY-57voice encryptiondevice for secure communications.
The PRC-77 differs from its predecessor, the PRC-25, mainly in that its final power amplifier stage is solid state and not vacuum tubes.
The AN/PRC-77 set is used by the
Australian Army Cadetsand the Australian Air Force Cadets. The Australian Army is phasing out the AN/PRC-77, which is being superseded by the RAVENseries. Because of a shortage of the Raven sets due to the extensive overseas commitments, the Australian Army still has AN/PRC-77 sets in service. Eventually, both the AN/PRC-77 and RAVEN will be completely replaced by the Thales MBITR in active service.
The only army still using the AN/PRC-77 as a main source of radio communication for regular forces is the Norwegian Army, but a radio set called MRR (Multi Role Radio) is being used by special forces and prioritized units like Telemark battalion
The Austrian Army still uses the AN/PRC-77, though it seems as if it is only used for training cadets in radio communications. For border patrol the Austrian Army now uses a new device called "TFF-41", which is capable of frequency-hopping and digital encryption. The Austrian Army also uses the AN/PRC-1177 for example the Austrian AN/PRC-77 have a special switch for a 25 kHz mode, which reduces the bandwidth of the selected channel by 25 kHz and therefore doubles the number of available channels.
In the Swedish Defense Force the radio system goes under the name Radio 145 and Radio 146 (Ra145/146), predominantly the Homeguard (State militia) is issued the Ra145/146.
The Pakistan Army has also used the set for the past 25+ years. Purchased from different sources including the US, Brazil and Spain, it is scheduled to be replaced in the next 5 years.
The Finnish army uses this radio as a "battalion radio", using it as a common training device. The radio is designated LV 217 'Ventti-seiska' (ventti being the Finnish word for Black Jack  and seiska is the slang term for seven). The army also uses a modernized version designated LV 217 M.
* [http://www.olive-drab.com/od_electronics_anprc25.php AN/PRC-25 and AN/PRC-77 at Olive-drab.com]
* [http://www.pacificsites.com/~brooke/PRC77.shtml PRC-77 Back Pack Squad Radio]
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